Kit is discontinued. some parts are still available. scroll down to link below for internal parts, coil and cup gasket.
Rebuild Kit for Surge Drain Valve
Fits SURGE MILK TANK WASHER Drain Cup
5747499 sunset drain kit
7750-0227-569 gasket
7750-0219-947 Vee Packing
Related Item;
7750-0112-619 - Gea Discontinued part number for complete valve
5747490 - Complete Drain valve 110 volt