As the subject really, just wondering if there would be much modification required?
You need to make custom subframes, even if they’d fit. If they do fit it will be tight because the MR2 is a much bigger car and the seats are bigger (I had one for 5 years and had a pair of Elise seats that I fitted breifly, before realising that they looked tiny and lost inside the car).
In fact I’d be surprised if they fit, and also confused why anyone would try it because they aren’t good looking, or particularly comfortable and the drivers side bolsters wear out incredibly quickly.