Reply to Numark M101USB mixer

I have Numark M101USB, i have turntable and Serato Scratch and i use them for scratching. M101 crossfader is not for scracthing because he doesn't have sharp taper for cut and scratch, like it's explain here http://rane.com/note146.html . There is not a Cross-Fader curve function available on the M101USB. My question is : is there any replacement crossfader for M101 with sharp cuts for scratching? Or is there any other solutions, some tricks?