Noisebud has released a free buffer scratching instrument plug-in for Windows.
We made Noisebud GranMa since we needed a fast and effective buffer scratch thing.
GranMa will simply sample the source as soon you hit the rec button and play it back at the buffers location with the two scratch platters (the left one will only move the buffer position and the right one will try to pitchbend it’s way to the platters position).
Remember that it will only sound when you move the platters, like a real deck with a broken motor, Have fun!
GranMa for Windows (VST) is freeware.
More information: Noisebud