There's a guy here in Tucson that does work like that. He recently made me a sheath for my hunting knife... His website is way out of date, but the work is top knotch! He uses these Tek-lok belt attachments. http://www.blade-tech.com/Large-Tek-...re-pr-841.html
He had my knife for a little over a week. I'll try to put a picture up tonight after work.
Mine was a basic sheath with the tek-lok and cost $50.