I have listed a pair of 128MB FPM SIMMs in the Amiga section of Amibay (completely forgetting that they're somewhat universal, so would perhaps have been better-advertised elsewhere)
https://www.amibay.com/viewtopic.php?f=24&t=3259
I don't know what speed they run at, nor do I know how to find out (Although if you know an easy way, I can try and find out for you)
I'm asking £20+P&P per SIMM. Only thing is I'm away from home until next weekend, so it'll be a week before I get a chance to post them.
Regards,