There are lots of dangler attachments for kydex - there are commercial ones that fit the same bolt spacing (1.5") that tekloks use, and it's easy to make your own from a scrap of leather or webbing.
I like the webbing options offered by both mashed cat and steelnut for drop leg carry, and it should be pretty easy to rig up your own version. I've got some kydex scraps from my sheath making attempts, and I will probably use those to make some drop loops as well.
With the ease of attaching things through the eyelet rivets used on kydex sheaths, it should be pretty straightforward to put whatever crazy attachment you can think of on there.