I had a custom snorkel build by a truck muffler shop. It's some kind of aluminized steel apparently. 3 inch pipes cut and welded at a local muffler shop (180$), a flange, a Donaldson Top-Spin pre-cleaner (80$) and some heat-resistant automative air duct (40$), T-collars, industrial tie-wraps and some Bar-B-Q heat resistant paint.
I went to a local shop during the summer vacation time to enquire about the feasibility. They where not busy and offered to do the job right away. It took a few hours to do and it rock solid. Pics are here: https://picasaweb.google.com/marc.an...eat=directlink
Now to fix the suspension and get the winch installed and I'm ready to go off-loading with Frank in the Pine Barrens...