Hard telling, the manufacturers use whatever they can buy in bulk cheapest. I would take one off and head on down to the nearest RV parts place and do some comparisons. The only other option would be to order all new vents and replace them. Or put Vent Covers on all of them.
__________________ There is madness to my methods
2015 Coleman CM16FBS(traded) 2016 Concord 300DS
2015 Ford Fusion Hybrid following along