An online part number reference would be hugely beneficial to us. As noted, GM Parts Direct's web site doesn't do too well when you search for Fiero parts, yet the parts are easily found by part number. Part of that is the crummy search engine there, but a lot of it is that the parts are listed for some other vehicle - and were also used on the Fiero. You'd be surprised to find how many parts in your Fiero are still made and used in new GM vehicles.
There's only so many 22P guides around and when they come up on Ebay they go for $50 or more. Not a great solution for someone who only wants one or two part numbers...
I wonder how hard this would be - how many different parts are in all the Fiero models?