For which company's coaches are the vents needed? I could make prints available for sale quite easily if I had the dimensions. If they are LCDR coaches, then I probably have enough information.
For plain vents without louvres on SECR stock, I generally make them from Evergreen plastic-strip. I find this easier than soldering on the metal ones.
Guy, they would be a boon for those GER 4-wheelers and the planned 6-wheelers. The door vents are quite pronounced and rounded, almost bulbous, and a 3D print might make for a better representation than brass.
Note, though, the subtle but evident difference between the vents on the 4-wheelers (1870s vintage, with square raised waist beading) and the 6-wheelers (1880s and with conventional recessed waist panels).
Edited by Edwardian, 14 September 2018 - 12:42 .