Hi,
I mentioned in a post here a few weeks ago that I have a number of 64 pin simms, but I have no way to test them to see whether they will work in GVP hardware, or even what size they are.
If anyone is willing to test one of them, and let me know the results, then they can keep that one, and I'm sure we could come to some favourable agreement regarding any others that they might want.
Regards, Fraggle1.