Seating

Try the wrecking yards or you could lash out and buy some Recaro's or similar.
When you change vehicles, you replace the originals and re-install in the new vehicle.

Don't forget that such modifications must be certified by the appropriate authority to be legal as it changes seating capacity. You may not care, but unfortunately in the event of an accident, your insurance company most certainly will :((

Just helped put some Sparco racing seats in my sons car.
He went and got the seats and bases he made blue plated (checked and certified by an engineer) so he doesn't void his insurance.

Not sure what recaro and other seat manufacturers recommend.

Might be an idea to check. Previously he had put in some seats from a skyline half cut, left over at the wreckers. Got those blue plated too.

I am told that the same series Sahara has bucket seats and they fit straight on to the mounting points without any alteration,trouble is finding a pair in reasonable condition.
Good luck.