You can order K&K pickups with "Vintage Jacks" so you don't have to drill the end out wider, see the
K&K Site. The vintage jack needs an 3.5mm plug rather than a standard 1/4" guitar plug, so an adapter or modified cable is required, the jack is made by
Tapastring. It also cost and extra $80.00.
An under bridge pickup and the vintage jack will allow resale without damage, I would think that a quilified luthier would be able to remove the sensors.