Kirban used to have coil packs for $50. I got mine there and it has been ok for a couple years now. I think it may be AC Delco also, and stock parts are mostly recommended for the cars. Kirban may have that ignition module also. Tim
Try Westside Buick here in Houston and mention that you're with the Houston Buick Club, we're supposed to get 10% discount. Can also try www.gmpartsdirect.com or any of the local parts suppliers if you're not stuck on using AC Delco.