Assuming you are in the UK then the nearest to the classic hopper cooled design would be the Alyn Foundry RLE engine, these are cast to order and may take a while to get a set depending on foundry timing etc. See my build thread for what’s involved

There is also Engineer’s Emporium Who do the Economy, Senior and the more commonly known Redwing which are all decent size as well as the vertical Perkins, the Junior & Little Wonder are a bit small.

E-bay and asking around can also turn up the odd unwanted set of castings if you keep an eye out.

I am relatively new to model engineering and getting towards the end of the Farm Boy engine. I found that I took it very easy and slow, and as said double check everything before making a cut and there should not be a problem.

It does not matter whether you make one from plans alone or from a kit of casting mistakes can be made so why not just continue with the farm Boy.

I am learning a lot from my build and can spend a couple of days going over how and what order to machine parts before I even make a cut.

Have a Look HERE

Did you make a decision, I hope you went with the farm boy.