Vintage Synth Repair

i need to repair a trace on this keyboard. looks like it's the result of 
a spill. it's in a very delicate area - right under the rubber key 
trigger pad, or very close to it. i've got it narrowed down to within a 
few millimeters. i don't see bridging with a piece of wire or foil as 
being an option here. the traces are too close together and a piece of 
wire would interfere with the trigger pad. any advice or helpful links?

thanks,
shayne