Perhaps we could all list sources that we have found for purchasing brewing related automation equipment. I stumbled across a website which sells enclosures and buttons. I am thinking of ordering some of the 22mm indicator lights to show when certain components are activated.
http://web1.automationdirect.com/adc/Sh ... Indicators
I do not endorse this website but thought it had some great products which would come in handy for what we are trying to achieve.