Re: andy
For the air filter you could look in the salvage yard for the right size air cannister that you would want. I've seen a couple guys who have used Ford ones that came out of the late model Escorts, they are more of a cylinder shaped. A better one I think is the Suzuki Samurai air boxes. OR you could buy something like an air cannister from
Intense Performance. For the top piece you can buy just the snorkel head from any ARB dealer but the dam thing is $70!!! To me that's just rape. You could easily get something like this one though
Which costs about half of that and is more like what the Hummers use. You could also build this pretty easily yourself for around $10 or less.
Another idea just to throw at you is something like this. Everything including the snorkel cover are made from parts at a local HomeDepot and best of all it was cheap! The airbox is from a Samurai.
One thing nice about this setup is that you don't have to worry about cracking that outside pipe from trail damage. Plus most water crossings won't come up much over your hood anyways, if they get deeper than that you're floating like a turd. Not sure which route I'm going yet though, make sure you post pics of whatever you end up doing!