Those zipper flipper coils can be hard to come by. Good luck with it!
https://pinside.com/pinball/forum/topic/wtb-e-184-277-coil regards rewinding the coil
from Planetary Pinball, here is the zipper flipper page (or flipper zippers, per Bally) from the 1969 Bally Parts Catalog. The assembly is a little different for Capersville, so read the notes http://www.planetarypinball.com/reference/partsmanuals/BLY_Parts_1969/index.html#/132/
Post edited by PMcGee: add links to Parts Catalog