Traction tyre sizes help

[punkieys17]

Hi, I have 2 Mainline locos needing replacement tyres. The first is a Deans and its tyres measure 14.2mm x 1.8mm wide and the second is a 43XX Mogul that uses 21.4x1.2mm. Obviously the tyres are a stretch fit but I need to find some the correct width and slightly smaller diameter. Can anyone help - so many manufacturers fail to give sizes - weird as it would mean modellers would buy more of their brand even if not for one of their models. Any help gratefully received.