If you like the DeMartini tone and want a hot pickup, a Bare Knuckle Holy Diver can work very well in a Les Paul. 15.5k, alnico V magnet, with nicely pushed mids for that 80's vibe. That's about the hottest I would go in a Les Paul and especially pushing through a VH4...there's already a lot of gain going on and you don't want to darken and compress your tone too much with the pickup being too hot.
If you want more classic 80's with less compression in your pickup and more brightness, a Wolfetone Marshallhead or a Bare Knuckle VHII. Both are around 9k, so they are more similar to a hot P.A.F. You'll get less drive from the pickup, but a more open tone.