Hi paulmillerplu.
there is a few ways you could get it back running.
you can look on ebay, flea markets or yard sales for a remote. (27 or 49 mhz) what ever frequency matched your rc.
you could get a different rc that has the controller and use those electronics to get it running. use electronics from a rc of similar size.
you can install hobby grade electronics but that will involve modifying the front end to fit a steering servo.