I have to agree with Paul. I've never made a sheath for a hawk before, but I do know how they are designed, and to make a proper one you definitely need to have the hawk. It would be possible to make a generic pouch-style one that might work for you, but with the time restraints and the fact that you don't even have the hawk yet to give measurements from, you would be better off doing it yourself. Cardboard would work, as Paul mentioned, or you could go to a Tandy store (some Michael's and Hobby Lobby will work as well) and pick up some leather and Easy-To-Do and do it yourself.