I have a conversion kit for my 10 gallon igloo cooler, and I like it a lot. This is the kit that supplies a weldless bulkhead and ball valve to convert the spout-hole in the cooler to a useable valve. I'd also like to find one of these for my 5 gallon rubbermaid cooler, but I haven't had any luck in finding one so far. It's really irritating to have to use a 1-hole stopper in the bottom because i fear that we'll knock it out and ruin a day of brewing when all of the mash liquid pours out of the cooler. Something similar to what we use for the 10 gallon cooler would be great for the 5 gallon orange rubbermaid cooler.

Suggestions, please?