Went to Pull A Part and yanked an EGR solenoid off of a 2.8 Camaro. Swap took 5 minutes. Works great. Cost? $5 The Camaro solenoid has a built in filter which appears to be replaceable. Highly recommend this swap.
If you ever have a questions about the sincerity of the circle of Fiero owners on this site, take a look at:
"In Memoriam: Fiero Members"
Avatar is of an actual Fiero on fire