The Luk 17-050 kit comes assembled, complete. You just bolt it to the crank. You'll have to clip the new release bearing to the release lever, and I would recommend a new release lever and pivot pin. They can be worn, and they are cheap and easy to replace.... you do not want to take the transmission out again in 10k miles because the pivot wore through.
I suppose a rear main seal wouldn't be a bad idea either if the transmission is out. is there one of those that's better than the other?
I'm on rock auto and see a few.
RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog.