Jemm posted this in another thread a couple of weeks ago, and I thought it was a pretty rad idea. I'm not really a fab it yourself guy, so I'm going to post the picture here and hope that someone will take up the project and make one (and I'll buy it off you, of course ).

Here's the pic:

 

Or maybe... you could buy the Apexi intake box, and cut a hole for the intake horn?