Try Lyft Offroad in Glenwood Springs. They are a few hours from Denver, but they are great people and great to work with. Give them (Sean and Christine) a call. They build amazing Jeeps.Not in the Denver area, but typically the going rate is $800-1,000 per axle. If I were dropping the money on gears, I'd save a little more and add lockers. Easier in my mind to justify the expenditure when it's a massive improvement in off road capability and a slight improvement in driveability. I think the extra ~200 rpms makes all the difference in holding 8th, but our 7th gear is an over drive as well. Not holding 8th wouldn't be enough of a reason to drop $2k in my opinion.