I live 30+ miles south of Erie near Meadville, PA. There's no longer anything close!
Two shops formerly in Erie are GONE.
Mercer Junction in Mercer PA, an hour+ on I79 south of Erie in Mercer, is GONE.
There is a shop in New Castle, PA which is a PITA trip. I've never been there because the trip is a PITA.
McCormick's in Zelenople, north of PGH, is about 2 hours on I79 and quite small.
There are no real options other than the Forum; TCA Ft Pitt meets in Pgh area, occasional private meets in Erie may still occur (I'm not sure).
There are also TCA and private Meets in the Cleveland and Buffalo areas, which are about 2 hours on I79 or I90.
Sorry for the bad news.
When you arrive in Erie, please get in touch with me!