Ram socks work, but something like this:
http://www.efihardware.com/products/...mm-ida-3.25-KN is probably closer to what you're looking for.
I used a Weber 48mm IDA carb to good effect, and I had a similar (and much cheaper) filter canister on it, that allowed the velocity stacks to extend up into the filter area; as that throttle body is an IDA style, and therefore the spacing should be the same, I wonder if a Weber IDA filter could be made to work with some mild adjustment?