I got mine directly from Atwood Products. 574 264-2131.
Since i had over half of mine fall off in about a year I put clear caulk at the front and back of each one as I reinstalled them - as well as to the remaining ones. Haven't lost one since.
Ed 2015 Entegra Anthem 42 DLQ
HWH Active Air, Pressure Pro, 595 Watts Solar,
2013 4D Wrangler Sahara