66 Dart Convertible Shoulder Belt options?

I've read in some older posts that people were swapping in 1996-1999 Sebring convertible seats, front and rear, to get 3 point shoulder belts in their older A bodies, but being 2023, there aren't too many 25 year old Sebrings out there to get seats from. Are there any other options that you guys know about, or have done yourselves? I'm not a fabricator, so I'm hoping for something close to a straight bolt-in if possible.
Thanks in advance!