I was not aware that Dexter even made "right hand swing" doors for RV applications. Typically that would be a hazard if the door happened to "jar open" while towing. If the wind caught it, it would do considerable damage to the trailer/door at 60 MPH. That's why all RV doors that I've seen in the past 20 years all have "left hand swing"....
You might want to fill out the contact sheet at the Dexter site and ask them for specific part numbers:
http://www.dexteraxle.com/dexterdoor/contact-us
On that page there's also a phone number to call their customer service. (574) 848-4491 They are located in Bristol, IN which is in the Eastern time zone.