I haven't done the swap. So take my opinion as such...
I do, however, own a set of new/unsed foam that I have yet to install.
The back is symetrical, or so close it should work on either side.
The bottom is very obviously asymetrical. One side has a gradual slope from the wide to skinny section. The other side has less slope but about two thirds down it cuts in and goes straight.
Could you make it work? I suppose. The cover won't fit 100%.
Or if you switch the whole pan, well, I don't know that the seat rail would work, but if it did...the latch would be pressing against a little bit more foam than before.
I'm a bit of a seat purist. I've been messing with these stupid stock seats for the better part of seven years.
I've fixed/reupholstered a set. Didn't look 100% right.
I've bought a replacement set that was mint. It eventually started to show the same wear(crumbly foam, bolster material wearing thin).
I've tried a set of 90-91 Prelude seats. I've tried a set of 96-98 GS-R seats. I've test fitted some ITR seats.
They all required too much fabrication or they were going to stand out too much from the interior. The Integra seats would have also put me closer to the ceiling...not acceptable at my height.
Now I've got this stupid replacement foam....
I'm to the point where I'm just going to get a set of nice Corbeau or Forza seats and call it a day. Recaro would be nice if it wasn't so damn expensive.