I'm having one made at the moment with GMX radiators. It's been a bit painful to be honest, as he has struggled to get the thin triple cores. I've gone thicker twin core instead. I've just got back from holiday, so not sure where they are at, but will update you once I've spoken to him.

Cost is about £500.

The other people are Bora, but couldn't find any contact details for them so went to GMX.