Somewhat off topic but I don't want to start another thread.
Left tie rod assembly (minus the boot) needs to be replaced- Should I replace in pairs or just replace the one?
To the OP- I like Pelican Parts. Great prices and they give manufacturer options on most parts. Also check out ECS Tuning and Turner. Pelican will most likely have the best price while still maintaining OEM quality.
Also, someone already mentioned it but I'd check out the tie rod that the dealer said was good. If they are saying the boot was torn, there could be damage to the inner joint. Granted, it's not as catastrophic as having a CV boot fail but it's easy enough to check for tie-rod wear. It sounds like you may want to replace the entire tie rod assembly on both sides just to get it out of the way.
"So when you go for a drive, remember to leave your murderous anger where it belongs - at home."