Just came across this post. Was reading with intrest as I have a SWB Cat
Heres the pics
It goes with out saying this car without a doubt was the hardest car in my collection to get together. Built over the period of a year with all new parts. I had one a few years before this but got offered silly money for it so I sold that one. Stupidly I then spent the next year after that trying to repleicate what I sold, and here she is. I was very fortunate to buy a modelshop out of all of there oldstock schumacher stuff a couple of years ago and amongst the lot were some VERY rare parts, SWB cat chassis's, sevral grey bumpers rare alloy cougar chassis's LOADS & LOADS. Jason if memory serves you bought a grey bumper from me, Mines still on the car you see above, sorry to here yours got broken...they are a rare piece!
I did buy some GRP sheet a couple of years ago and I got fibrelyte to cut a whole bunch of swb cat and xls & procat chassis's out for me (these are now all sold)
It took me a good few months to come across a swb belt but they are out there, seem to remember I paid £20 for the belt alone!!! anyway, Im pretty sure I have 1 of the bumpers left in my parts lot its new with the 4 spacers, pm me if your intrested.
Good luck with your build
Scott