Help...4r70w output tailshaft bushing

I have a 99 GT with the 4r70w. I have some play at the slip yoke where it goes into the output tail shaft. I know I'll have to get the bushing changed out. Question is where can I get just that bushing? I called my local dealer and they say it's not serviceable so they don't show a part # for just the bushing, have to get the whole tailshaft ext. housing, I was like WTF!!!

Any help greatly appreciated

Automatic Transmission website found

Took all day, but I found a website that sells the individual transmission parts. For anyone else that would like to have the site for their Automatic tranny's here's the link: Transmission Parts Automatic Transmission Parts Order Online Transmission Parts