Thanks guys, yep, it's a Geno's fuel door.
Like Kalaehina stated, the install is a no brainer. Remove the two hex head bolts that hold the OEM, remove the rubber stops and secure the new one. Mine was slightly off center on one hole, just opened it up a bit, other than that, piece O cake.
The green diesel cap is from Geno's, as is the rubber spill guard. you need to drill a 7/32" hole in it's center, then open it up ( by hand) with a 1/4" bit for the tether to fit. The fuel door has a small hole already in place for the tether.
I'm not real thrilled with the magnetic latch engagement, which is housed in plastic. It's engagement is positive, but I wonder how long it will last. Good thing is that it is bolted to the the door's frame and is easily removed for a new and improved design, if need be.
Even my wife thought it looks great, imagine that.
Scott W.