C6 Seals

[mdwsr]

Where can you find the seals for a C6 without having to buy the whole rebuild kit? I need the outer seal for the reverse clutch piston (7D403).
I pinched some the edge off trying to install the piston. Thought about inverting it (inside out). It fits but maybe not a good idea.
Thanks for the info.

[alphawave7]

Search ebay for that part number.

edit: Not certain, but this may be the same?
http://www.fordpartoem.com/oe-ford/al3z7d403a