Welcome to iRV2!
I am sure you will find many friendly & helpful members here to give you a hand.
To answer your question...my suggestion is to contact Northwest RV Supply here in Eugene. They are a great company to deal with and their prices are very good! They also ship all over the USA and Canada. Their toll free number is: 866-678-7467.
I would also like to suggest that you visit The Newmar Forum...
and ask for some Karma while you are there. The members there are also very helpful and they have more than enough knowledge of Newmars to help with many brand specific ideas or problems.
Again...welcome to iRV2...we hope you visit & post often!