Heartthrob exhaust is in Litchfield MN and all their stuff from what I can tell is bent in MN. Good shop that sponsors at the local track.
I regularly buy over the counter bends from them when I pass through.
Heartthrob took the conservative approach when the EPA was slapping fines for 'emissions delete' items and pulled their stuff off the website for anything pre 72. They 100% have the kit, if you call you might have luck and they will sell you a box of bends for a miscellaneous vehicle that might just happen to fit a G body....