Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Welcome to the Forum from the Great State of Texas.

American Manufacturers:

Jensen
Empire
Weeden (weedensteam.com)

Only one still in business is Jensen. (jensensteamengines.com)

Mamod is the only UK Manufacturer still in business (mamod.co.uk).

Wilesco is the only German Manufacturer (of any scale) still in business (wilesco.de/en/).

I suggest you scan their websites and see what catches your eye.

You could also consider looking at a PM Research kit:

https://www.pmmodelengines.com/

Finally, Forest Classics (https://www.forest-classics.co.uk)has a nice website.