Also worth noting it was supplied with all the main machining done to the castings, just some drilling and tapping required so you won't find a raw set of castings.
This site is good for details and history of all the Stuart steam models, 10V here
It would not be hard to recreate either doing the bed casting and standard from solid or as a fabrication. Could also modify an existing 10V bed and just make the standard. Here is one I did earlier which is similar size to the original No7 which also had the single standard and rod rather than the A frame trunk guide. Probably the next of my series 24 engines to go in ME as already mentioned to Martin, though I may do one of the smaller ones like the Basset Lowke Eclipse or Stuart Simplex first.
CAD – Rendered
Construction
Finished – no castings used and less than half the cost of a No7 casting set. in materials