Not sure how helpful an appeal process can be if the requirements are codified. But it can't hurt to try.
As of right now, for intial licensure, based on the fact that the OP took Step 1 six time (failed 5, passed last time) and assuming the OP will pass Step 2 and Step 3 on first tries ... for a total of 8 attempts
http://www.fsmb.org/usmle_eliinitial.html
The following states are eliminated (for initial licensure ... not sure if you can get licensed through other means such as reciprococity)
Georgia - 3 attempts per USMLE Step;
Idaho - 2 attempts per USMLE Step;
Illinois - 5 attempts at all USMLE Step combined;
Indiana - 5 attempts per USMLE Step;
Maryland - 4 attempts at each USMLE Step;
Minnesota - 3 attempts at each USMLE Step;
Nebraska - 4 attempts+ at each USMLE Step;
New Hampshire - 3 attempts at each USMLE Step;
North Dakota - 3 attempts at each USMLE Step;
Oklahoma Medical - 3 attempts at each USMLE Step
Rhode Island - 3 attempts at each USMLE Step;
South Carolina - 4 attempts per USMLE Step;
South Dakota - 3 attempts per USMLE Step;
Texas - 3 attempts at each USMLE Step;
Wisconsin - 3+ attempts per Step;
Look at the link I provided for more details. Of course, having a state not listed here does not mean you will have no problem getting licensed in such state. As always, contact the state board to inquirer about appeal/waiver of requirements and other requirements that they might impose on either IMGs or all doctors in general.