I went with a strip of butyl rope caulk used for sealing windshields. Stuff is a 1/2" diameter but you can stretch it down to any size you need. Press the window in place, then tighten it as much as possible without distorting the panel. Once it's in, you can just run a dull knife around the edges (plastic is good so you don't damage the paint) and peel off anything that oozed out. A rag damped with mineral spirits does a nice job of cleaning the edges so it looks pretty much factory.
PS ... I might have mentioned it earlier, but the windows I used were recommended by the seller after an eye's on inspection of my 2011. One advantage to living relatively close to the shop, eh. Be interesting to see their recommendations for the later model TCs ...