That’s Hoffman Hoff’s shop you linked a picture to, you might want to email him and ask him if he has any updated KP9 Levers left, and then use that in there, though since you’re going to need to remove the spacer you’ll probably want to use a recoil buffer.

I’ve got a KP9 running with a Super Safety for a friend so i’m just guessing here on where to start, I’d get a KP9 Lever or an AKV Lever or print them and start testing. Probably the best case scenario is to download and print a few test copies from the files here https://guncadindex.com/detail/SSAK_remix:c I’ve spoken with him and he helped me get the KP9 running, i’d recommend printing the -0.40mm CAM and trying that first and then adjusting as necessary. Once you have it running with printed versions, you’ll know what you need to order in metal. Or just run the parts in Carbon Fiber and you’ll be fine.

For the WASR M you’d probably have to remove the spacer and use either a modified AKV or KP9 Lever.