I sometimes use 1/8" copper foil tape for certain board repairs, but I generally have to cut it in half for some things (which can be challenging to do since it tends to bunch up or slide away).
At one time, 1/16" copper foil tape was available from certain suppliers, but I can't seem to find anyone who currently carries it.
http://forums.arcade-museum.com/showthread.php?t=236080
Does anyone still carry it, or has it been completely discontinued?