Reply to S2 spare parts?

Hey guys, a buddy of mine has an s2, however the crossfader and volume faders seem to be malfunctioning. When opening the unit i found the fader chip to be covered in dried soda. So i removed the chip, desodered the faders, wiped them down with alcohol, resodered them on and gave it a go, but it still wasnt working. Everything else on the controller works perfectly. Does anyone know where I can buy this part? I've been searching everywhere online, but have found nothing. If anyone could point me in the right direction it would be awessssome! Thanks!!!