ARB has one but it isn't cheap.  Couple hundred easy.  Lots of people have made home made setups though.

i had a home made snorkel on my 8v came out damn nice if i must say so my self its for sale if any one wants along with an 8v header (calmini) like new. well any way put on the cone took about 15 to 20 min cake runs good so far thought it was sputtering a bit but here are some pics did it just like AJM said, thanks for the help..

wheres the IAT

the AIT is in the back of the air filter drilled it out and screwed it in look for the big blue blob on back used the blue to fix hole I made in side when drilling sh&t. what a big difference sound and maybe power not sure yet but for the time it took it was great mod. now I need to open up the exhaust.

I only say it's the best because it requires the least amount of work to accomplish what you need.  And you don't need to fuss with anything sensor wise.  It's all pretty much stock.  And as for keeping water out...that's just common sense.  I didn't think i needed to be so literal.  No it won't "keep" water "out" but the air filter is much better protected  from the elements in the Airbox with this set up than it is with an open cone filter sitting under the hood.

But of course if you go through a small river it's all a bad idea.  But for rain and puddle jumping i believe my idea is the safest way...and you still get the benefits of an open element intake.