These are very common/standard connectors in a ton of GM vehicles.
Off top of my head I'd say EFIConnection or any other online vendor that makes engine harnesses or upgrades, can hook you up.
Lots of sellers on eBay as well.
It's a metri pack 150 IIRC, but I would have to physically go look to verify.
The pins/wires are easily removed from the plug housing, and the plug housing can simply be replaced.
My local NAPA sells individual connector housings, pins, seals, etc. BUT yours may not?
I usually order off eBay, because they're cheaper, and I can assemble myself.
There is probably a premade pigtail available @ mcparts stores, but they are usually poorly made.