I came across this and to me at least it sounds like it might have potential for success, at least politically.
"State Rep. Jim Lucas (R) has filed legislation that would repeal Indiana’s current concealed carry permit program in favor of free and lawful unlicensed carry.
The bill introduced would strike down the state’s popular handgun permitting scheme as enforced by the Indiana State Police, replacing it with language allowing unlicensed or so-called constitutional carry in the state of 6.5 million. Just four other states have similar laws."
"With some 570,712 permits issued, Indiana has one of the highest rates of lawful concealed carry in the nation. According to a 2014 report from the Crime Prevention Research Center, only South Dakota has a higher percent of the eligible population that has a permit. A large part of this is due to the state’s historically low cost for permits, ranging from $10-$50 that include an option for lifetime carry."