Can anyone point me other than hunting ebay for a good place where I can find the missing part please - the after market part for makers like CAL-SCALE ? I did think on buying a plastic model and cannibalising that part buy would prefer to find if anyone has better ideas…
Contact English’s Model Railroad Supply (Bowser). They carry most of the full line of Cal-Scale detail parts, not the tiny amount shown in the little yellow catalogues formerly offered by Cal-Scale, but rather hundreds of parts used on brass models from various manufacturers.
Another place to look would be Greenway / Trackside Specialties. I cannot speak to this particular part but they are one of the best sources for parts for brass locomotives.