You could try a conductive ink pen and see how that does. Unfortunately, they tend to be higher resistance than copper and I don't know if it's going to hold up.
You could also try copper tape - http://www.amazon.com/TapeCase-1126-Copper-Foil-Tape/dp/B007Y7FA
I'm unclear whether the adhesive is conductive or not, so you may also need solder to bridge to the rest of the pad.
If you go the etch route (you could probably just draw the layout by hand with sharpies if you wanted to) then I see 2 ft long sections of PCB here: http://www.amazon.com/Copper-Clad-Circuit-Board-005/dp/B00JJ8Q8ZK/ref=sr_1_5
Ultimately the PCB solution will be the best long term fix, but the tape might be a quick solution.