You could also try the Newmar parts department in Nappanee. Customer Service (800) 731-8300 will connect you to the parts counter. I've had good luck ordering several items directly from Newmar. And you may be able to find it on Amazon.
Ken & Ara Brewer
2020 Newmar Ventana 3407 DP. Freightliner All electric, Cummins B360, Allison. 2014 V-6 Chevy Equinox Toad.