[SEL] OT Water pump leathers for the piston

[Ron Frost]

Morning group,
I have an old piston type water pump that I want to restore and drive it with my Sattley engine. 
I need the piston packing or leathers or cups or rings or what ever one would call them. The leather is in the shape of a dish with a hole in the middle where the rod goes. The dia is roughly 1". My question is, Where can I find them?

 Ron Frost
  http://picasaweb.google.com/ronfrost217/MyPhotos
 
Collector of other peoples cultured merchandise