You have to find the exact name in the commonres folder which contains all native equipment, and name it to what it say it is. I would not recommend using the native models, the bows don't match up with the crpg animations.
I was working on a retexture for the bows in cRPG, to look better. (not a final_boss look though just normal.) However I kinda stopped but seeing as people would want a retexture besides me I might continue.