You should be comfortable with electronics and typical home voltages. You would need to acquire a relay (solid-state or mechanical) or a good little contactor, an enclosure, appropriate wiring, and an outlet or two. It’s not something that I would consider difficult at all, but some people are not comfortable with that kind of stuff.
If you are looking for an easy and out-of-the-box solution then building it wouldn’t be for you.
After some digging, I actually found a site that says they have Qty:(1). They are out of Canada…
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Brandon Parker