Mate you can buy a Samco or Samco copy for an early rex that requires a small trim but fits perfectly otherwise. I've got one on my RS Conversion with the standard WAIC.

Subaru Silicone Intercooler Hose Kit WRX GC8 92-95 RED V1-2 | eBay

Comes with the WAIC-Throttle Body hose too. You just need to make a small cut to remove the extra 90 degree bend. Not too hard at all!