I ordered a 6" nylon for my S5. I imagine it will fit - I hope it will fit, though I'm guessing it wont be a great fit.

I just wanted to make sure I had something day 1.

I also ordered one of the kydex 6 inchers from the store, hoping it would fit or could be adapted.
If not I can always put my Scrapper 6 LE in it.
Win-Win! <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />

There's an ebay store that has 6" and 8" Spec Ops sheaths going out at the moment for around $28USD at the moment. I think the RRP is quite a bit higher and most of the places I've seen online have also priced them higher.
I think they are discontinued colours, but they had black, tan and OD when I looked.
If you search for "spec ops sheath" I reckon you'll find them.