i know the fb had a rear seat available but is there any other seats that would fit such as a seat from an FC? or another car of some sort.

 

I have never seen it done, and you would be hard pressed to find a seat small enough to fit back there, and if you did a large amount of fabrication would need to be done to get it to work out right.

 

kind of what i figured just wasn't sure.i'm used to hondas and you can swap almost any part from one year to the other so yeah.

 

It's been said that the 2nd gen rear seats will fit. I can't say I've seen confirmation of that though. Perhaps someone who has done this will post.

 

About 5 rx7's ago, I went to a junk yard and got some rear seats from a eclipse early 90's model.
The width was perfect, all I had to do was remove a little foam from the center of the bottom of the rear seats, they had brackets I could bolt to my car, and when not in use they folded down basically completely flat.
I wish I had pics, but hope that helps

 

any pics of this? and are we talking pretty much bolt in with a bit of trimming to the seat or the back rest?

 

i read a thread where 240sx rear seats were used. and ive seen fc seats shoe horned in, but as rare as those are you're going to pay. Your best bet is to search "rear seat" in this section.