Can't grab pics from the site - lots of pics, but the one thing I'd never seen was the BTTF3 ILM shirt - totally cool. I know I'd buy a repro. Maybe I missed the run, these seem like a no brainer for one of our talented t-shirt guys.
It shouldn't be difficult (for me) to make vectorized images of the shirt. If you have a printer for large paper sheets (A3 or US-Tabloid), some large tranfer films and a flat-iron, then you can make your own shirts.
If there are more people interested in this shirt, I could make the vector graphics.