Well, i bought an ADM ae86 driver seat, and it fits, however it was a bit of work to try to bolt it in especially on the front right side so i don't think the mounts are exactly the same, but close enought that if force it, the holes will line up.
Also, the plastic cover on the bottom right hand side that covers all the recliner gear rubs up hard against the side of the car i.e. the ae86 seat is about half an inch too wide at the back. I think if i take the cover off it will be alright.... hopefully!
Cheers