I even tried the local zoo, but they told me they keep their sheds for "educational" purposes.
That's really lame. Like SnowShredder said, sheds happen often, so it's silly of them to be selfish with them. Even a huge Burmese is still going to shed at least a couple times a year.

That looks really awesome, by the way, even with it worn. I imagine it redone will be even sweeter!

I think your best bet for that size is going to be a Burmese, Retic, or a really big Boa. Don't forget, sheds are really lightweight, so I would think you could get one mailed to you, especially if you'll pay shipping (which wouldn't be much - a large padded envelope would do it). Try looking for reptile rescue or herpetological societies.

I went to Petfinder to see if there were any Burmese on there; Midgard Serpents Reptile Rescue has a couple it looks like. There are also a few boas on there as well but it's hard to tell size. Also try contacting Tom McCarthy (http://www.mccarthyboas.com/home.html) He lives in Northwest Indiana, but he has several large snakes, and I'm sure probably knows other people with large snakes.