Denny,
The 1LWK8 is the part number for a 12 volt motor.
Grainger part# 2M196 is a 6 volt motor. It is the same size as the 12 volt motor. They only have a limited supply of the 6 volt motor and I suspect that when they are gone they will be discontinued. You can get the heater gasket set from American Classic Truck Parts and a few other vendors with links on this site.
Grainger will sell to only other businesses. It should not be too hard to find someone with a business license who can order one for you.
