Eugene, if you can't find any solutions you need, worse case scenario go to Jeff (aka rainwalker from over at the Yard forum). He can make you literally any type of configuration you want weather in Kydex or leather. His quality is top notch and you want find anything much better IMHO. He does a ton of custom work for the Busse kin knives and setups plus everything from Guyot design kydex bottle holders to swords, etc.. He can make it if you can't find any solution. Like I said he would be a last chance option if you need it, all you have to do is shoot him a email with what you want, he then will tell you how much it will cost and both of you work out what idea works best with you. He can do cliplocks as well if you need, which sounds like what you want,a combo of a slide on clip that locks and want come off if hung upside down and climbing or swimming.

http://sites.google.com/site/rainwalkercreations/