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

It is one niche that has yet to be filled IMO, no toy steam manufacturer save the Marklin repro offered compounding. I had a little play around with simple compounds awhile back but using separate engines. I think you could possibly make one using Jensen parts if you were creative enough. I'm not sure if this is something CMS might offer as a future model, it might be worth dropping them a line. Otherwise you main option is Stuart models or possibly AJ Reeves as i know they offer compounds in their engine ranges.

https://www.officeofsteamforum.com/collections-pictures/jensen-65-acting-as-a-primitive-compound/