i added on a billet chrome locking fuel door cover at the dealer when i picked up my vehicle last year. it wasn't the hummer brand one as that one was like $300. i don't remember how much it was (although i am sure they charged me way too much for it), but it serves its purpose, has a quality hinge and locking mechanism and matches the vehicle well. my only gripe is that they should come with some type of padded strip between the circle and the fuel door to eliminate any movement when closed, as it does tend to rattle sometimes. drives me nuts!!!!
btw- new south swell is rolling in today!!!!