there are books out there to help you find repeter locations, but i find this to be the easiest so far. its still a bit of a pain, but this is a google overlay to show you pushpins for the general loction of most of the repeters out there. the pain is not all of them are listed and not all of them listed are active. If anyone has an easier method please share.
http://k5ehx.net/repeaters.kml