Maverick: Too close for missles, I'm switching to guns.
I did a fair amount of searching through other people's rigs looking at what they did for a switch box to control their pump. Here is the approach I went with. Thought it might help for those looking to create something in the future.
Hammond Manufacturing 14360 11.75 x 8.5 x 3 NEMA junction box with screw cover (purchased on eBay)
Toggle Switch w/Waterproof Boot and Safety Cover (purchased on eBay)
Leviton 4937 Weatherproof Inlet on Flush Mount Wallplate with Aluminum Cover, Straight Blade Receptacle (purchased on Amazon)
I currently receive power from a GFCI outlet that is in my garage. I don't bring my brew rig elsewhere so not having that type of outlet installed in my switch box doesn't bother me. If you do build something similar and plan to bring it somewhere I would pick up one of the portable inline powercord type GFCI outles if nothing else to save you from possible harm.