I have one of the Ukrainian boards and would be able to modify the board with the USB fix this weekend. If you're still looking for testers, I'd be happy to give the updated software a go on some of my old disks around here.
I have any of the following hardware at my disposal.
A500, A600, A1000, A1200 (030/50), A2000 (030/50), A3000 (040/25), A4000T (060/PPC). All models are NTSC, PAL only available on the A600. OS' vary from 1.3 - 3.9.