I am a fan of the Ripoffs pouches. If you don't mind nylon and velcro, they are very robust. Belt clip or loop for belt, with some searching of their choices, you should be able to find one to fit your needs. From looking, the CO-193 may work nicely. 3 1/2- 4 1/4 x 1- 1 1/4. You can call, they are quite helpful on the phone... And, they list a "Custom" service... Modify an existing design for a whopping $10.00.