My driver side speaker grill has became cracked from its age, there's a small hole in the center of it as well, is there anywhere I can get replacement ones other than eBay? Thanks.

This could be a problem. No one that I know reproduces a front speaker grill for a 3rd gen Firebird. So your only options are:

1. Fix what you have (assuming it can be repaired)

2. Find good used replacement parts or new old stock (NOS) on eBay, Craigslist, or at salvage yards.

3. Fabricate your own replacement out of masonite, wood, plastic, whatever

Hawks' Third Gen may have something since they carry both new and used parts

http://www.hawksthirdgenparts.com/