Ok then,
I announce that I have at least 6 tested ROMs with KS3.1 (40.63) in them for sale.
They were taken from dead Amiga 2000 computers and so they should work well with A500, A600 and A2000 computers.
I know that in some A500, it may require some hardware modifications for them to work well but I wouldn't know what exactly.
I will sell them for 18$ each. Shipping to the US and Canada is 7$, shipping to the rest of the world is 8$. Shipping is the same price if you buy more than one chip.
ex:
-you buy one chip and live in the US, your total cost is 18+7=25$
-you buy two chips and you live in norway, your total cost is 36+8=44$
All in US dollars.
Please PM me.
Thank you all!
Added edit:
===================================================
A friend informs me that if your A500 already has KS2.04 in it then KS3.1 should be a direct plug-in replacement.