'03 LTZ here. Have GT4 and G80 codes. Went to autozone to pick up a pumpkin cover gasket only to discover it ain't the same shape as my bolt pattern. And everywhere I look I don't see the 8" cover gasket specifed. Took me half a day of online research to find out I have a 8" 10 bolt posi unit. So now doing some digging all I could find is the one from Lube Locker > https://www.lubelocker.com/product/llr-g800/ And that does look just like my shape. I don't see a cheaper one. Certainly not from the chain autoparts stores, ebay or amazon. Advise please.