I ordered some element enclosures from Bobby over at www.brewhardware.com.  There are a lot of options to solve this problem.  A popular option is to build an enclosure out of a double gang junction box.  The price is right and I think Bobby’s solution is much better looking.

brewhardware.com
2x Element enclosure EWL3 with large cord grip

Just snagged some 20 gallon kettles for cheap.  $99 each and under $350 for the whole lot shipped to my door.  Prior to finding these I was looking at $250 and $350 options, and that was for one.  For the cost it is worth the gamble.  I am not big on fancy pots.  My current one is a 15 gallon Update International stock pot that I added a valve, sight glass, and thermometer to with weldless fittings.  The fittings have been great.  The pot is actually heavier then these new ones because it has a triclad bottom.  This is unnecessary especially for an electric kettle.  The new pots are 18″ wide by 19″ tall, I would have preferred a narrower and taller pot.  I will not be adding a sight glass or thermometer to these new pots.  I will have temperature probes on the new system and I find sight glasses to be more of a hassle then they are worth.  I prefer volume markings on my mash paddle.  A quick dip in the pot gives me the information I need with none of the additional mess and cleaning  that sight glasses bring.

Amazon.com
3x Concord 80 Quart Stainless Steel Stock Pot