No i have not contacted them, and i won't.
I bought the kit through a dealer off a different board, and i asked him and he said as far as he knew TG wouldn't guarantee either. Looking on their site, the TRE's are not guaranteed so i don't feel like there is a point. Which is fine, for i have already bought the replacements from marlin.
Don't get me wrong, i don't like bashing any company, and i don't feel like i am, i am just saying, with what i have seen lately on my truck and how quickly parts are wearing out. I would either PEICE together my kit which would include making most of the parts that i could, or buying a different kit..
Honestly, if i sas'd a future rig of mine i don't feel like i would buy a kit again, since picking up more fabricating skills since i sas'd mine. I didn't even use the "extras" that came in their kit. I ordered marlin parts before the sas kit cause i had originally planned on going marlin.
I would Piece together mine.