Ive got the same front end and have only just had it repaired. I caught a speed bump and it cracked either side, taking big chunks out with it. (It looked a bloody mess) It only cost me £100 to get fiberglassed and sprayed and its spot on. I was under the same impression that it was a Bomex front but Ive seen it named as part of the West kit somewhere else. I bet your looking at £400-500 for another one, and thats if you can find one!
Ive had my Supra since May and have been to the JAPS Show, JAE and TOTB, and I havn't seen the same front end on another Supe, so It may be hard to source another front, but don't quote me on that!