NAPA carries good t-bolts. Also Have your pipes bead rolled and they won't blow off. I've never had any car I've built blow off a charge pipe. Bead rolled pipes, good couplers and T-bolt clamps are good to over 30 psi.
Yeah, I just picked up a charge piping kit a friend made, I'm gonna get some VHT and spray the pipes, but I never thought about NAPA for some t-bolts, do they also have nice couplers?