You can use jBridge or 32 Lives to run 32 bit plugins in Cubase 9 and 9.5. But I strongly recommend using a 64 bit alternative, they’ll be far more reliable.
Give VB3 and Blue3 a try. Halion Sonic 3 also has a pretty good organ emulation, and includes other vintage keyboards and other potentially useful instruments, which might make it a better bang for the buck depending on what kind of music you make.