I bought a C&O Berkshire with white-wall drivers (and trucks) recently at the Rail Yard Hobby Shop in Roanoke, VA.  I would like to fix that by installing a new bell.  My address is xxxxxxxx, Roanoke, VA 24012, telephone xxxxxxx Do I need a proof of purchase for something this small?  I'll have to look for my receipt: I seldom keep them.  Thanks.

Randy Moore