Reply to Alpha fader for VCM 600

Here goes guys,
I have opened the guts of my VCM 600 as I have a volume fader that is misbehaving since I spilt some beer on my mixer! I have narrowed the volume fader manufacturer to be Alpha and the dimensions of the fader are as listed on this spec sheet
How would I identify what rating the fader would be so I can buy a replacement?
Sorry if this has been answered elsewhere but all I can find is details of modding vci 100's.....
Whilst I have the guts out of it would anyone like me to up some info on anything inside my box? (I mean the mixer btw)!
Fleater