With all due respect to Arch Hoagland, it won't matter what year it is as I've checked with Remco for years pertaining to Audis and specifically the TT so if you want to take the time to put in each year the TT was made and the specific model into the Remco pull-downs on their website, it will not give any information on the TT for any model. You'll get the standard "Remco has no information for this vehicle at this time. Please check back later or contact your Remco dealer."
Again, even if Remco had a lube pump available --which I'm certain they don't-- if you can't find a base plate for the TT, how are you going to tow it in the first place? You'd have to configure and make your own which I certainly would not recommend.
As I mentioned, I'd sure like to hear if somebody has flat towed any model year TT and what base plate they used as I've checked with Blue Ox, Roadmaster, and Demco and none of those manufacturers make a base plate for any year or model of TT. Maybe they have recently (within the last several months) and I just haven't heard about it.
I'd love to buy a new or used TT. I hope to hear from somebody too.