Hey, I'm close your same situation. I E-mailed rt-mod got measurments, 40" waist was the only thing I need shimming for. I also e-mailed AM, but still am awaiting a response. I sugest you should do the same. Here is what I learned;
Calf:17"
Thigh:26"
Forearm:13.5"
Waist:40"
Bicep:13.5"
Helmet:24"
Rt-mos said the rest wasn't size relevant.
I just made the cut on everything but the waist, but I believe the waist measurment isn't your pant size, it would be at your belly button. I wear a 38" pant, but my gut it 44". :/
Just cut soda for over a month, and started running, not eating past 8 and so on. Best of luck to you. Let me know If you find out any more info that I may be unaware of.
Good luck, have fun,
Chris