I posted that thread in January '13 dealing with the same issue. I did like everyone else said, and ran two pieces of moleskin side by side. At the time, I called NPD explained the issue; they were nice enough to send out the needed extra pieces free of charge.
I can't speak for everyone that's done this, but I went with this correct material to try and correct some binding issues I had on my '66 fastback. At the time, I had the fuzzy material that NPD and most other vendors carried before the moleskin became available. I really thought that replacing this functional replacement with the original style moleskin would solve my window issues, but it didn't. Again, I can't speak for everyone, but something's still not right on my fastback. I can roll the windows down, but my wife has a hard time. And this is a car that we had every nut and bolt off of, so I know the tracks aren't bent and that the regulators are clean and well-greased.
I still say that if you can find it, a track with original material is the way to go.