This is a couple of different options for an Inkbird ITC-1000 enclosure. It is designed to fit a standard squared outlet (the straps will need to be shortened to fit within the enclosure.) There are four knockouts sized for 1/2 connectors to protect power source. Designed to minimize need for supports
The 2-gang box can be used as a single stage (cold/hot,) or if you snap the connector on the outlet, can be used to control both hot and cold.
Also available in 3-gang (for separate hot/cold plugs) and 4-gang sizes (for hot/cold/always on plugs.) The 4-gang box is sized to fit on a 200mm x 200mm print bed, so the fit is very snug, but I have verified everything fits with a little effort.