I have on loan from Canon Professional Services the following two lenses:
MP-E 65mm f/2.8 1-5x Macro lens
24mm f/3.5 ii Tilt/Shift
If you'd like to come check them out, drop me an email.
I won't be able to let people take them outside to shoot them, but you are welcome to play around in the building or studio.
I only have them until Feb 11th.