You know, there's probably a significant market demand for ruggedized chassis among civilian robots.
As someone who came from farm work out in deep boondock, I've been kicked by bulls, had vehicles run over my foot, and been within fifty feet of a lightning strike (my dad took one in the shoulder; my mom's dad grounded one from a fence he was repairing). My neighbors when I was a kid had various accidents; one went into a combine, one got his arm ripped off by a haybaler. Another couple fell from grain silos. Both my brothers have chainsaw scars on their legs. My oldest brother got hit by a flying cable when the darn thing snapped while he was clearing brush, and got serious back injury. And yes, all of us have hunkered down in a ditch and seen tornadoes up close with scrubby little desert oak trees doing their best imitation of tumbleweeds.... Farming and ranching are hazardous occupations.
It seems to me that to the extent that (civilian) robots work in hazardous occupations, there'd probably be a demand for the kind of Chassis that Bubbles and Faye have been fabbing and repairing. Not necessarily fancy or showy, but ... standing up to a whole lot of physical violence in the case of mischance? Yes.
As anybody who's ever seen a car made since about 1978 after a serious great-plains hailstorm knows, cheaper manufacturing and lighter exterior metal means consumer-grade machinery just isn't made to stand up to real-world hazards. It's one thing on the coast where pea-sized hail is about the worst we ever see (one of the reasons I moved) but back on the great plains, golf-ball sized hail is a thing that happens once every three or four years, and if you don't have your recent vehicles inside a building, the body metal just gets wrecked.
So, I figure - the same probably applies to Robot Chassis. We've already seen how May's is just falling apart. Compare that to the needs of bots working in agriculture. Or timbering. Or out on commercial fishing vessels. Or doing mountain rescue. Or professional drivers (who do in fact have to survive crashes every so often).
So if Bubbles & Faye turn their expertise to providing ruggedized chassis for robots, it isn't just an illegal-combat specialty; there's a legitimate civilian demand. They could build a business doing something good.