There is no way to extend the shorter schedule, so I have made a new one for 30 rounds. I think I have everyone playing together either 2 or 3 times, and also everyone starting at each of the 9 holes either 3 or 4 times.
Hope that works for your league.
round H1 H2 H3 H4 H5 H6 H7 H8 H9
R1 19 4 34 12 16 21 33 7 23
R1 3 27 6 1 25 26 24 18 17
R1 29 2 30 9 32 13 28 11 20
R1 35 15 31 8 36 10 5 22 14
R2 20 5 35 7 17 22 34 8 24
R2 4 28 1 2 26 27 19 13 18
R2 30 3 25 10 33 14 29 12 21
R2 36 16 32 9 31 11 6 23 15
R3 21 6 36 8 18 23 35 9 19
R3 5 29 2 3 27 28 20 14 13
R3 25 4 26 11 34 15 30 7 22
R3 31 17 33 10 32 12 1 24 16
R4 22 1 31 9 13 24 36 10 20
R4 6 30 3 4 28 29 21 15 14
R4 26 5 27 12 35 16 25 8 23
R4 32 18 34 11 33 7 2 19 17
R5 23 2 32 10 14 19 31 11 21
R5 1 25 4 5 29 30 22 16 15
R5 27 6 28 7 36 17 26 9 24
R5 33 13 35 12 34 8 3 20 18
R6 24 3 33 11 15 20 32 12 22
R6 2 26 5 6 30 25 23 17 16
R6 28 1 29 8 31 18 27 10 19
R6 34 14 36 7 35 9 4 21 13
R7 17 6 13 18 20 33 12 23 26
R7 31 10 29 14 5 3 30 28 27
R7 32 35 22 19 34 25 11 21 24
R7 8 16 4 36 1 15 2 7 9
R8 18 1 14 13 21 34 7 24 27
R8 32 11 30 15 6 4 25 29 28
R8 33 36 23 20 35 26 12 22 19
R8 9 17 5 31 2 16 3 8 10
R9 13 2 15 14 22 35 8 19 28
R9 33 12 25 16 1 5 26 30 29
R9 34 31 24 21 36 27 7 23 20
R9 10 18 6 32 3 17 4 9 11
R10 14 3 16 15 23 36 9 20 29
R10 34 7 26 17 2 6 27 25 30
R10 35 32 19 22 31 28 8 24 21
R10 11 13 1 33 4 18 5 10 12
R11 15 4 17 16 24 31 10 21 30
R11 35 8 27 18 3 1 28 26 25
R11 36 33 20 23 32 29 9 19 22
R11 12 14 2 34 5 13 6 11 7
R12 16 5 18 17 19 32 11 22 25
R12 36 9 28 13 4 2 29 27 26
R12 31 34 21 24 33 30 10 20 23
R12 7 15 3 35 6 14 1 12 8
R13 18 23 11 3 9 12 31 4 32
R13 17 29 6 28 20 26 16 24 14
R13 10 7 15 30 19 33 21 1 8
R13 25 13 5 27 2 35 22 34 36
R14 13 24 12 4 10 7 32 5 33
R14 18 30 1 29 21 27 17 19 15
R14 11 8 16 25 20 34 22 2 9
R14 26 14 6 28 3 36 23 35 31
R15 14 19 7 5 11 8 33 6 34
R15 13 25 2 30 22 28 18 20 16
R15 12 9 17 26 21 35 23 3 10
R15 27 15 1 29 4 31 24 36 32
R16 15 20 8 6 12 9 34 1 35
R16 14 26 3 25 23 29 13 21 17
R16 7 10 18 27 22 36 24 4 11
R16 28 16 2 30 5 32 19 31 33
R17 16 21 9 1 7 10 35 2 36
R17 15 27 4 26 24 30 14 22 18
R17 8 11 13 28 23 31 19 5 12
R17 29 17 3 25 6 33 20 32 34
R18 17 22 10 2 8 11 36 3 31
R18 16 28 5 27 19 25 15 23 13
R18 9 12 14 29 24 32 20 6 7
R18 30 18 4 26 1 34 21 33 35
R19 19 22 9 15 16 5 31 25 7
R19 36 34 35 6 27 24 10 1 33
R19 23 28 14 20 8 11 12 17 3
R19 2 30 21 32 18 26 29 13 4
R20 20 23 10 16 17 6 32 26 8
R20 31 35 36 1 28 19 11 2 34
R20 24 29 15 21 9 12 7 18 4
R20 3 25 22 33 13 27 30 14 5
R21 21 24 11 17 18 1 33 27 9
R21 32 36 31 2 29 20 12 3 35
R21 19 30 16 22 10 7 8 13 5
R21 4 26 23 34 14 28 25 15 6
R22 22 19 12 18 13 2 34 28 10
R22 33 31 32 3 30 21 7 4 36
R22 20 25 17 23 11 8 9 14 6
R22 5 27 24 35 15 29 26 16 1
R23 23 20 7 13 14 3 35 29 11
R23 34 32 33 4 25 22 8 5 31
R23 21 26 18 24 12 9 10 15 1
R23 6 28 19 36 16 30 27 17 2
R24 24 21 8 14 15 4 36 30 12
R24 35 33 34 5 26 23 9 6 32
R24 22 27 13 19 7 10 11 16 2
R24 1 29 20 31 17 25 28 18 3
R25 25 32 23 19 29 33 14 26 8
R25 5 9 24 12 7 20 1 30 17
R25 11 13 10 3 18 16 22 35 6
R25 4 21 27 34 31 2 15 36 28
R26 26 33 24 20 30 34 15 27 9
R26 6 10 19 7 8 21 2 25 18
R26 12 14 11 4 13 17 23 36 1
R26 5 22 28 35 32 3 16 31 29
R27 27 34 19 21 25 35 16 28 10
R27 1 11 20 8 9 22 3 26 13
R27 7 15 12 5 14 18 24 31 2
R27 6 23 29 36 33 4 17 32 30
R28 28 35 20 22 26 36 17 29 11
R28 2 12 21 9 10 23 4 27 14
R28 8 16 7 6 15 13 19 32 3
R28 1 24 30 31 34 5 18 33 25
R29 29 36 21 23 27 31 18 30 12
R29 3 7 22 10 11 24 5 28 15
R29 9 17 8 1 16 14 20 33 4
R29 2 19 25 32 35 6 13 34 26
R30 30 31 22 24 28 32 13 25 7
R30 4 8 23 11 12 19 6 29 16
R30 10 18 9 2 17 15 21 34 5
R30 3 20 26 33 36 1 14 35 27