Scratch it! is a free scratch / tapestop vst plugin for windows, it is specially created for live scratching and tapestop effects.
With the envelope you can define how the stop button works on the audiosignal, it allows you to define up to 16 points in a synchronized beat grid, like this the stop button can act as “scratch sequence”.

REQUIREMENTS:
Gameboy sound fx 45 synth game effects recorded from Nintendo Gameboy. Kick / hit sfx collection 15 house/trance hits and bassdrum fx. MFB-Synth Lite SFX samples 32 MFB-Synth Lite SFX samples. Vinyl noises 19 vinyl fx and noises. /free-vst-plugins-for-mixcraft-8.html. Vinyl Revolution vol.2 Vinyl. That and the ms pinky plugin are the only two plugins that can use timecoded vinyl. If you actually want to scratch (as opposed to just making a scratch-like sound), then you should get a turntable, some timecoded vinyl, and this plugin.