I'll tell you what I use as my self made pick case. It's very easy. Go find an inexpensive lockblade, bitchblade, etc from an inexpensive store. I picked up mine at a surplus store here in Albuquerque.. Just take the knife out of the little belt hook case and there you go! mine is about 5- 5 1/2" long and about an inch wide. Has a loop on the back to hook on your belt! Let me know if you find one!!
Sincerely, Pickinboogies