I came across a 1987 Rebel 250 in great shape (Barn find) and got it running. There is one major issue... 3 of the 4 exhaust studs have been repaired improperly and is completely trashed. I expect the exhaust to fall off any day. New are extremely expensive. I found what looks like a china copy. https://www.aliexpress.com/item/33029906821.html? I wonder if it will work??? Anyone here have an original OEM head for sale?