Dorman 47065 is what you need to tell the parts store. Taht's the part number. Use the big o-ring off the unused elbow to replace the one on the metal elbow of the tensioner.

Also..and this is important.. wiggle that tensioner front/back of the car a lot and ever so gently pull it toward the passenger fender..take a ton of time doing this. If you pull to hard to the fender you will break either the tensioner or the timing cover where it goes in. Wiggle and it's all good.