I see these sporrans all over Colorado as day sporrans. If it is the price you are worried about price you can always make one. The pattern seems simple with 4 parts sewn together. I have seen a pattern on X Marks before yet I am only finding the one listed below at the moment.

http://bladesandbushlore.com/index.php?topic=6774.0

It looks like 2 U shaped parts for the front and back, 1 part that looks like a circle with a handle for the back and the flap, and one part for the front that the lacing goes through.