i have a set of 4th gen slp firehawk 17" rims i'm going to put on my '89 formula.

i'm not crazy about the slp center caps. i've seen firebirds with "ws6" center caps. doeas anyone know:

a) will those caps fit on my slp firehawk rims

b) what year/model firebirds they came on

c) where i'd find them.