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

Welcome aboard Ken 

I´d suggest that you check out Graham Industries...if you aim for machined kits.

https://www.grahamind.com/store/


If you intend to machine them yourself, i am only aware of PMR when it comes to steam engine kits, eventhough i would assume some castings is available elsewhere as well.

If you wan´t combustion castings, Martinmodels could be a solution as well:

https://www.martinmodel.com/collections/model-engine-casting-sets