I popped in a set of Saab 93 seats they've worked fine for the last 15 years but I am due for another set.
Here are a few things to keep in mind:
- Sports car seats tend to sit lower than truck seats... I found that the lower seats were much better in a 40.
- I would look for 2 door car seats, then they usually come with a lever to fold them forward to access the rear. Sedan seats usually don't have this feature.
- I would sell a kidney to buy seats with heaters in them next time. I run my 40 topless about 80% of the time and heated seats would be awesome early in the day and late at night. On my next pair they are a must have, wiring and all... YMMV.
- I found a lot of the European manufactures would work on the 40, Saab, BMW, Volvo, VW etc. no idea why more of them seemed to fit in the space we have but they do. I found the US/GM manufacturers seemed to look bulbous vs the trim clean lines of the European cars. Japanese seats were hit and miss.
- I picked up a pair of grey leather seats in great condition for $150/pair fifteen years ago.
These are late 90's Saab 93 seats... they were the right size, grey and cheap.
Mine were easy to mount with a 1/4" plate of steel, drill and hacksaw... I basically mounted the FJ40 slides in parallel with the Saab slides which are on the inside of 40 rails. This was luck, but I just kept measuring till I found a set that worked. Now that I can weld and bend steel and fab what I want I will seek out the best pair I can afford that looks the best to me.
...and one more thing. Seat heaters... you're welcome.