Hi I just spoke to Trevor today and the reason that they are not doing the bottom heat shield any more is that they lose way to much money on them. It's because they are hand made and not stamped out, that bottom collector one takes about 5 hours to make and mount by itself and it just doesn't look like that much work has gone into them. They charge $110 an hour for labour and then there is the cost of coating them etc, so they lost big time on mine as they only quoted $600 odd all my heat shields. So mine and 1 other set of the collector heat shields are the only ones they have made and they have decided not to do any more, so basically it's an economic decision as they just lose to much money making them ( not to mention that they were a pain in the arse to make). So they are only going to do the two for the pipes from now on.