I may well do. I'm just trying out some older firmware this week on my one. If my suspicion is correct and the 2.09 firmware is no good for me, then I'll definitely be interested in swapping with you.
Both chips need to be swapped - the EPROM is only half the story with regards to firmware on these things.
Mega"SST" 12, MegaSTE, STE: Desktopper case, IDE interface, UltraSatan (8GB + 512Mb) + HXC floppy emulator. Plus some STE's/STFM's