Letti gave me the name of a good physio she has used in the past, whose name I also came across on an ITBS forum on the Eagle AC website (cured a girl of ITBS in 2 visits using acupunture). He's a triathlete and so may understand the issue better than a general sports injury physio.
Thur 1st May 15 Miles in 01:51:16 (07:25 pace @ 146 HR) Thomas - the stretch (left leg is the affected leg) 1. Cross the left leg behind the right leg, keeping it straight/rigid and extend it as far to the right as you can go with your left foot resting on its side on the floor . The right leg will be bent at the knee (crouching position). You will probably need to hold onto something. 2. While keeping the left leg straight lower your bum vertically towards the floor and tilt your torso to the right and you should feel a stetch come on the outside of your left leg from your hip down. I hope I've described it right. Otherwise you may have trouble explaining yourself to anyone watching you.