stereo,
What's the reason behind your wanting the testing?
Is it to see if they qualify you "officially" as gluten allergic (celiac) vs. gluten intolerant? The tests can prove false negatives, and false positives too. I was tested and showed no problems, yet gluten is a big offender.
Did you ever try the gluten fix remedy?
Whenever I want to cheat with either gluten or dairy, I take 4 capsules after the cheat meal, and have no issues at all.
I do cheat with pizza, ice cream cones every 2 weeks or so.
It might work for you as well.