I made my own for my 2008 XTX 700. Took some head scratchin and about 3 hrs, but it turned out great! Cost me about $28.00 in pieces and glue, etc. I'm not big into deep water, I did it so that I didn't have to clean the damn air filter after EVERY (dusty) ride! The snorkel kit is above the box and the filter stays super clean for a long time now, oh and it sounds freakin awesome when ya "whack" it!!
I'll try and post pics here, wish me luck!
This is an 3" to 2.5" rubber adapter for plumbing. It worked great to transition from the oval shape clutch exhaust pipe to 2" pvc. I sealed it with a fat amount of urethane and let it sit overnight before tightening the clamp.


Here you can see how the clutch intake (1.5") and the clutch exhaust (2") worked out.

Carb intake (1.5")

and finally, the top parts. Sorry I don't have a better pic, but after this I took the pipe on the left (EFI intake) and put a couple of 45 elbows in it so it followed the line of the roll bar brace better. This will give you an idea of height too. I ran the center pipe (clutch intake) higher, because I didn't want it to suck in the warm air from the clutch exhaust (right side pipe).

Hope these pics show and I hope it helps ya!