What budget torque converter?

I buy a lot of stuff off ebay; Red Eagle clutches, Kevlar bands, whatever is cheaper than my supplier. But I can't find a rear seal for a 65 904 for under $60. JUST THE REAR SEAL.
I have never bought a thing off ebay, or rock auto. I won't deal with a company where I can't talk to a human, before I order something, or if I have a problem.
That said, it seems like rock auto is MADE for your rear seal problem. So, what gives?