There are a lot of part numbers that may be compatible with the ks0108. I have tested with the ks0107 and S6B0108.
Here is a more extensive list I have come across of parts that may be compatible:
KS0107/KS0108, HD61202/HD61203, AX6108/AX6107, PT6608/PT6607, KS0708, S6B0708, S6B0108A, S6B2108, S6B0108, SBN0064, ST7548, NT7108, RA8808, RW1065