Big thanks to Rikos, Terry and Adie for the replies. I will checkout Thor Racing, thought i knew all the places in my home town !!. My mate has a garage but only does electronics mainly BMW and Merc, very little software available for Lexus. He does business with loads of garages in the area and has asked 3 today if they have ever done a cam belt on a Lexus and none had, we are indeed a rare breed !!
thanks again guys, i will try for a Midlands meet and try to blend in with all those IS's. I did try one for two weeks as i think they are great cars fuel consumption was a shocker though having said that early days in the GS (still on 1st tankfull)