What kind of custom pedal do you want? Lokar has a few nice ones that you can see on-line at
www.lokar.com.
JCWhitney is another possibility.
If you mean the stock, but deluxe, GM pedal that has the stainless steel trim, then there are plenty of vendors on here who sell them, plus the aftermarket that exists for our trucks has them.
Oh, welcome to the board from the heart of Arkansas! Let's see, McDonough is doing real good at being south of Atlanta on I-75, right?