I've now got it in a custom folded-cardboard-and-packing-tape sheath, made out of the box it came in. (How's that for survival resourcefulness?) When the Busses get back, hopefully I'll get a sheath or so that I (think I've) ordered via the company website.
Try camo duct tape. <img src="/ubbthreads/images/graemlins/wink.gif" alt="" />
The new & improved $2 camo duct tape/cardboard RM sheath with step-by-step pics