I bought sets from someone on line....they have the correct webbing, aircraft-style buckles, and hook mounts. I think i got them from andover industries (?) but i dont remember for sure.
Problem is that they all come with eye bolts to mount to the floor, which dont look great, and i also question the strength. If you can find the OE mounts they are indeed pricey.
I ended up using the seatbelt mounts for 2 seat t-birds that i bought from Casco. They were inexpensive, and I had them chromed for something like $50 for the set of 4 brackets. Now that they are installed, they look like they could/should be OE, even though the correct ones for the fairlanes are kinked/bent. Hope this makes sense....
Ron GroveWauconda, IL