Stickers. Brilliant!I think it looks pretty sharp, too.
If you were going to swap pickups, I'd look at different colors, covers for the HB, etc. But otherwise it might be more trouble than it's worth.
A quick 'n dirty option is to just put stickers on top of the bobbins. For $10 you'll be set, and hard pressed the tell the difference from a distance. (For example, a google search gave me Pickup Sticker Decal for Humbucker /DiMarzio DP100, there are tons of others.)