I picked-up one at the Southern this spring. They do exist, but I think the one I bought makes two that I've seen. You might try John Bugden. He used to make leather handguards, and may still be in the business. I found this email and number for him on another forum:
Johnwbugden@yahoo.com; 270-753-0305. Don't know for sure if the number and email are still good for him. ---Matt