Lumen, I really do feel your pain but you really have two options
1. Get an adaptor there are a couple out there that aren’t two bad, wouldn’t use them wide open though.
2. What camera did you have with the FDs? Dust it off and go shoot some B&W film it’s fun and it does sate the frustration, cool and retro according to my daughter and her bf has just got a 2-1/4sq TLR, don’t know what the hell is going on!!