My 1994 Gulfstream has cam locks on the hood and engine compartment. I never had the round key, so had to crawl under the coach and unlatch them by hand from the backside. Finally got tired of that and took one off and took it to a big locksmith outfit in Las Vegas. Guy took one look at it and said he couldn't make the key. The lock was made by an outfit no longer in business, but if you are lucky there was a distributor in Phoenix that still had some, but they don't do retail sales.
I tried Gulfstream, but they weren't a lot of help. Claimed they didn't have parts that far back.
I finally went to Camping World and bought a set of four new locks with keys for $28. You can also get them at most hardware stores. Had to do quite a lot of fabrication to get them to work as the old ones had a much longer shaft.
Al & Sue w/T-Bone & Rosco
Go Devils Bus, 1994 8.3 Cummins, Spartan Chassis