WTB: Rear Trans Output Shaft Seal

Anybody got one for a CA18DET tranny? if not anybody know of a part number?

chicago rawhide number is 13907. Should be about 5 bucks

What store is that at? Would a Bumper to Bumper be able to get it?

any parts place. NAPA, B-B, CT, Partsource, Probably even wall mart.