Haining's "Countryman's Steam" has verticals for a Sentinel, Caradoc and 3" Merryweather.In steel but these couild be a basis for a copper version
As well as the Clayton mentioned there is the 3" Atkinson from Reeves
There is also the Reeves RV62 drawings that build into a nice 6" dia vertical copper boiler that could be adapted from static to vehicle use
Edited By JasonB on 27/08/2016 18:30:59