Double check my part# but I believe the GM part is 10427649. If so, I found one here:

Classic Chevrolet Grapevine Pre-Owned

2501 William D Tate Ave

76051, Grapevine, TX

+1 800-259-1200

Buy GM Performance Parts & Accessories | National GM Parts

Pipe

OEM part number: 10427649
Fuel feed

$97.62