Apollo 1240/60 64 mb single simm

Someone can suggest me a 64MB ram module which works with Apollo 1240/40 and this mod?
 
I'm interested in modding my Apollo to 64 mb. But in long time I didn't see any kit to buy. I would like to build one myself but as I see sold kits are little different comparing to what was posted in: https://www.amibay.com/threads/apollo-1240-60-64-mb-single-simm.61572/post-847775
How different is this? As I understand I could build it using two AND gates (e.g. 7408) and it should work. Is there any other logic?
PS. How fast should be used IC?
 
I'm about 10 years late, I know. But I am interested in upgrading my 1240/40 card, is there a way I can still get these upgrade kits to 64mb of ram?
 
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