Us auto guys are always willing to help another modeler...
You have more than a few decal options but here are a few:
From JB Graphix Decals:
1) #8 Bud
2) #8 Bud Born on date
From JWTBAM
1) #8 Bud World Series
From Nascals
1) #8 Wrangler-Retro (ran in 2004)
For building supplies, kits, and resin upgrades try either of these two specialty guys...
http://www.angelfire.com/nj4/mm0/ (modern motorsports from NJ)
http://www.smhracing.com (scale motorsport hobbies from NC)
This should give you a start...