Yes, a few times in previous posts, but I should have mentioned it again or just search Google, there are a few, but two main ones stick out and are Nationwide (see below).
www.longlife.co.uk
www.powerflowexhausts.co.uk
www.topgear.co.uk
I think topgear and longlife are the same company.
Longlife made me a full exhaust system for my RX300 many years ago and it was well worth it.