Did you try Dixie Gun Works?
Also Winchester Sutler may have some parts for it.
270 Shadow Brook Lane
Winchester, VA 22603 - USA
Phone: 540 888-3595
Fax: 540 888 4632
Also Deer Creek Products - at 765-525-6181.
DGW can be a little aloof. I was in their shop a couple of months ago and they acted like I didn't have any money in my pockets. But both Winchester Sutler and Deer Creek are great people to work with.