OK so i was flippin through the camaro performaers magazine and just on the lookout for thirdgens as usual and i found a part made by brphotrods.com that say you can hook a set of 98-02 brakes to ANY 10/12bolt rear axle, the part looks like a spacer so i was wondering where i should go for the calipers, i tried the parts store but only got like cardone and other off brands ive never heard of

Where can i get a set of LS1 rear calipers im going to run my own lines and all that so the setup doesnt matter to me i really dont wanna go junkyarding for this but im afraid i might have to