Great question — answering as the UphillTech team:
No-one will sell a commercial product like that. It's dangerous. DC is nasty business. Seriously, go to mouser and pick any random power relay. Look at its specs for AC, and then look at its specs for DC. Whoa! DC is de-rated by a large factor because when a DC arc strikes, it doesn't self-extinguish because the voltage never goes to zero. An arc, once struck, doesn't feel pity or remorse or fear and it absolutely will not stop until it's burned up so much conductor it can no longer bridge the gap, and if that sets your house on fire, too bad. If you've seen old "snap switches" which have a considerable action to them, they are preloading and releasing a "snap" action which creates a large...
Full answer by Harper - Reinstate Monica: https://diy.stackexchange.com/a/103915 (CC BY-SA 3.0).
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