No problem!
The faders are cheap, pretty readily available too.
http://int.rsdelivers.com/product/alps/rsa0n1219009/n-type-master-fader-dual-pot-10k-100mm/2511704.aspx
The rest of the problems sound like some of the joints have gone a bit dry and need resoldering. Check the jacks, xlrs, pots, switches. Resolder them all. Could be the insert jack too, stick a jack in there and pull it in and out a few times.
Those channel strips are pretty simple, not a lot too them. The one in attached pic has been robbed for spares, but you get the idea!