4" dia spoked Wheels

[johnslocos]

Try Walsall Model Industries
01922633718
Ask for their 5" gauge tender wheels, tell them what you are using them for and they should be able to turn the pully flange. The guys name is Rodger (good bloke!)
John C

 

[Zerogee]

How about looking on evilBay for some old Meccano large pulley wheels? I'm sure they used to do some quite big ones, from what I remember of my old sets as a kid....

Jon.