I love the way Jocelyn replied. Very appropriate.
On the more practical side of things... has any one looked at what is happening with your back. The people I see with chronic TFL pain often have one or a combination of these other factors:
Restriction or irritation at the L4-5 vetebral motion segement
Sacroiliac joint movement dydsfunction
Multifidus weakness as well as the typical imbalances seen with TFL problems (glute and deep abdomenal weakness)
And movement dysfunction at the foot like weak muscles in the arch and/or flat feet.
Have you had your running stride analyzed? If you are crossing over the mid line before initial contact during your stride, that's a huge contributing factor that needs to be addressed.
Hope that helps a bit.
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