I have some of the dropp down BladeTech attachments that I have used for pistol rigs. They work pretty well, but they are not cheap. BladeTech makes quality stuff and you pay for it.
This sort of belt attachment would probably work for you. Just a basic kydex loop but dropped down a bit. Rainwalker or Leatherface could make something like this for you pretty easily. If your rivets are set to accomodate a large TekLok, then this would be pretty straightforward.
![[Linked Image from i88.photobucket.com]](http://i88.photobucket.com/albums/k185/rteagard/Knives/IMG_0074.jpg)