Need 5.3 Coils, Harness, and Computer. Best options please...

[Spry69]

Hi, I purchased a 1999 5.3 from a 1500 pick up. It was pulled and replaced by a crate motor. The guy said everything was there except all of the electronics: No coil packs, wiring harness, or computer. I'm new to the Vortec world but knew i wanted to go this direction when I got my truck. Now I have my truck and need to track down the engine parts needed to get this bad boy up and running. I checked out another thread that said PSI had a lot of the parts. They seem to have most things, but not the coil packs. I guess I'm trying to find out if there is a one stop shop for Vortec parts? I've looked at Summit and they have the coils but I'm looking for someplace that specializes in these Vortec motors who can get me lined out with all the parts needed. I've been searching ebay, c-list, and this site, but have been unable to find these parts. Any help would be much appreciated. Thanks in advance.