Guy had a good price on em as well as Chad at ALLIGATOR, but GM gave me a deal I couldn't turn down. I've been doing quite a bit of business with em lately doing this swap so they have been giving me dealer trade price on parts. Let's just say GM has one HELL of a mark up on these things(over $150 of profit per injector).
The only one completely rebuilding the injectors is Bosch/GM. If you buy from anyone else you will not get the same thing. Bosch will not sell the rebuild parts so you cannot do what they do unless you want to make your own injectors. If all your looking for is a good running truck and not looking to increase the size/flow there is only one source to go with and that's Bosch factory rebuilds.