Drawings and remaining castings are available from Blackgates Engineering; our friends at Model Engineers Laser produce - amongst many other useful parts, all listed on their comprehensive website - profiled brass parts for cab, bunker, tanks and running boards.
If you need inspiration to get started (or would simply like to save some time in the shed and buy something ready to run!), we have a particularly good running example in stock at the moment.
|wheel material||cast iron|
|axlebox type||plain bearing|
|cylinder material||cast iron|