PJ, I'm in the same boat as you, but in an S13... my particular setup *might* allow my FMIC to fit if I flipped the lower rear portion of the bumper support to the inside. Sort of crushing a box into an "L" shape, if you know what I mean. My other thought was to cut out the back half of the support between the mounting points and weld it back in flipped front to rear, recessed behind the front half.
Maybe not the clearest description, but I figure another S chassis guy would understand 
With JDM bumper supports specifically disallowed, our only other option would be to relocate the radiator rearward (seen statement on this board that this is allowed, but can't find the rule?) and fit the IC between the rad and the latch support with custom IC piping.
That's my idea, anyway!
Dan
SM S13