I have a 2000 16’ pro v. The two vent caps on the outside of the boat broke off. I have tried lund and Lund dealers and can’t find the correct size replacement caps. The Atwood caps 911526-1 are a bit too large. I need replacement caps with the male threads measuring 15.4 mm. Does anybody have any idea where I could get replacements that fit? Thanks. Really appreciate it new member here so apologize if I’ve posted this in the wrong place.