Leather USB Cases for Keychain

Leather carrying cases for single usb keys to be attached to keychains. Must have a strong loop for key rings installed. Small, high quality leather units, with a secure closure as well. I need a very secure clasp that closes strong, and must be able to hold the standard small usb key as well as the larger wireless internet key from Telus. Must be able to be embossed with company logo. Case can be alone or include removable usb key. Willing to do mass marketing to generate large sales.Thank you.