Based on your measurements the # MR78RR would be the correct option from MORryde. We also have the strut assist version available which is # MR65RR. The doors may not close properly if the threshold is outside of the 5/8" - 3/4" range so you might need to add some extra material to the threshold to use either of these.
We do have steps with an 8" rise that will fit your doorway width of 28" and entry height of 34". The Lippert SolidStep RV Steps # LC791572. The steps aren't quite as wide... view full answer...
Currently we have no way to verify if the Lippert SolidStep RV Steps for 29" to 36" Wide Doorways - 3 Steps # LC791573 will fit the 2014 Winnebago One 30RE. I have linked our help article near the bottom of the page which will take you through the necessary steps to verify if you will be able to add steps to this camper. view full answer...