I have an 05 too and replaced the lines a few years ago. I had my mechanic do them so I can't offer any specifics. He did get them through GM.
I didn't attempt to do it myself as I knew it meant tranny fluid running down to my arm pits (unless you have the car on a lift). Rockauto.com has inlet and outlet hoses listed but can't tell if they are the whole hose and tube assemblies. You can call them to check. Good luck.