I got all mine except the metal embedded pan gasket locally, and the pan gasket can be gotten from the dealer by ordering it for the 42RH trans if you want one of those.
I did get the seals individually locally.
The dude just dug through a few boxes of extra rebuild kit parts.
Transmission Parts Online Automatic Transmission Parts was a really good source with great prices.
"tweet, tweet, tweet" for automatics huh? :D
There are a few of us that have done them for a living in the past, but in my case I'm not on here all the time but can help sometimes when I am.