Go to any automotive shop. They have all types of step bars they can install on your MH.
I found the shops that 'specialize' in installing hitches have all the right equipment to do it, and they get what ever part you want in over night, and all that I have used were very fair priced.
Also you can call your local CG and ask who they use for RV mobile Repair. I have seen these guys install steps on the drivers side right where you have the MH parked. Doesn't have to be in a CG either.
We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us.