you wont find shap rap blanks probably, at least i have not
plenty of flicker styles out there. get a few different ones till you find one you like.
repaints are / can be a lot of work if you want them nice. sandblasting is probably the best if you have access to a cabinet. thats how a lot of the pre rap wiggle warts are done. i just re did some shad raps recently and its more prep time than it was worth
otherwise as previously stated you can tape bill and scuff paint and make stuff different colors.
you can also just respray factory sealed baits with laquer paint if you dont want to reseal. scotch brite the finish a bit and go, this is by far the fastest and easiest