Well no luck on that site, but I did manage to find a buddy with an aftermarket cap that he had that fit and works perfectly.
Different key than mine, but at least I can fill up and lock it down again. $25 total for the cap and it looks good..
'05 V Star 1100 Classic - "Lucille"
Viking Sissy Bar Bag
Viking Sissy Bar Luggage
Viking Windshield Bag
Unknown Fairing and windshield
OEM Luggage rack
SlipGrip iPhone 5 mount
Eklipes Chrome Cobra USB charger