I am looking to do this as well. Not because it different, but because it puts the doors,
in line, the same way the front and rear deck lids are, when they are open. I will be receiving my kit at the end of month. My kit is going to be from street dream. Just the hinges though, not the whole kit.
You might try Decah "Pronounced deck-a. They make kits mostly for ricers, but I have seen a few domestic cars as well. Here is their website - WWW.decah.net
How many other Fieros have this mod done? Maybe, I will have to do a how to on this.