Re: Velo seats in sw20
I bought a pair of 2nd hand, FIA type Velo seats with standard side mounts & fitted them in a Series 2 RX7. I imagine they would fit, its probably a similar amount of width to fit in the available space of an MR2. IIRC they were originally from a Ford Escort. Its possible the seats are available in different widths, not 100% sure though.
Nice seats IMO, I really liked them. I had a workshop fit them on the standard rails, cost around $650 for both, no idea whether that's a good price or not since I never really examined how they were mounted.
No idea of the legality, pretty sure the halo type (where the top of the seat extends around your head to form a 3 sided "halo") would be illegal. Being a true 2 seater would possibly mean that the non reclineable aspect wont matter. Rear seats were removed from my RX7 so it was technically a 2 seater. Making sure they are ADR compliant is a must, which I think the Velo seats are. These are all assumptions though.
Why don't you try getting in contact with Velo, pretty sure they are an Australian company.