ive got the same prob when i fit my throttle bodies mate, i have come up with a simple solution.

all you need to do mate is get an alloy block made up the same shape as the ISCV with 2 take offs, then have a take off from your air filter go in one side of the ISCV, then have a take off in your inlet to the other side of the ISCV.

quite simple.

all it needs to do is bypass FILTERED air to the inlet