[Looking4Lower]

IMHO, the first option to attempt is to get a mechanic to the plane on-site (dealt with this on everthing from light singles to jets). Lots of amazing things can be done by a mechanic right there on a ramp.

Flying the plane to an MX facility is my choice #2, but that's a risk management call. Is the airplane safe to fly? Is it "airworthy" in the technical sense? Are you comfortable doing it? What other factors might be involved in that decision? Of course, if anything happens the FAA always has the option of burning you with "careless and reckless."

I had the same thing happen to me a number of years ago, in a taildragger. One brake was crapping out on a regular basis, and I flew it to another airport nearby for MX. I was comfortable with it at the time, although I knew there was a little risk involved.

One other thought - an inop brake doesn't just effect total landing distance. What if a deer/truck/pedestrian appears in front of you on takeoff or landing roll? If you really need to stop NOW with completely assymetric braking, you may go for a ride off the side of the runway.