There certainly are panel mount 120V breakers. If you get a couple that are small enough, you could mount them to a blank coverplate in an outlet box (a handy box or similar). Depending on the breakers, it might not technically be up to code to do so, but it would not be especially unsafe. Probably the round pushbutton kind would be the easiest to mount (as making round holes in a coverplate is easier than making rectangular ones, at least with the tools I have).
If overloads are not a common problem, a couple of panel mount AGC fuseholders would also suffice.
If this were my project, I would just get a single or double position circuit breaker box such as has been already shown.
