Wanted FJ40 '74ish seat frames/seats

[Mongoose]

Hey all, long time no post.
Does anyone have an original set of seat frames and possibly seats for the older style ('74) FJ40 that they'd part with? Prefer Christchurch area if possible. Having some hassle with a WOF due to the mechanic claiming he doesn't think the frames my aftermarket seats are bolted to are the original ones.
Grateful if anyone can help out. Post here or PM if you can.
Cheers.
Greg.