There are actually hundreds of places to buy the needed parts. The harder part is getting the step off and then it ispretty simple totake things apart to get down to what part has actually failed.
If you hear the motor run, it has not failed! then it is one of the other small parts gearsbeing one of the common failures.
But the whole set of gears and connections is around a $100 if you want to replace the whole unit.
OR it may be a common little nylon gear that costs $3 and you grease it well before you put it back together!
Some examples from a quick search for "Lippert step parts":
"https://www.google.com/search?q=lippert+step+gears&oq=lippert+step+gears& aqs=chrome..69i57j0i22i30j0i390l4.5335j0j15&source id=chrome&ie=UTF-8
First we have to find the model of step ( on the label?) and then find what part has actually failed before we do a search for that exact part! It's not rocket science to spot a burred off gear!
But it can be greasy!
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!