I remember now how I got it. Dave B was offloading a load of odds n sods to help buy his first BAe Hawk turbine.
I got sucked into buying a home built little balsa red jet thingy and this engine was attached to it. The air-frame was not in good order so years later it got binned but the engine was removed. I think it is a Weston 36 and the pipe is a Cougar. It could go into the Mini Magnum. I fitted it to my glow engine test bed and got it running. The first prop was 8 inch but the piece of wood aka chicken stick, I was using to flick it chipped it badly. Found another glow prop, a bit big at 11x7 but it fitted. Runs quite nice actually and surprisingly quiet too until high throttle where the overly large prop bogs it down.
Strangely around the same time years ago I also bought off Dave a DLE55 which never saw an aeroplane till 2019. I think it was removed from an SBach that was sold airframe only. Funding entry to turbines I suspect. The DLE55 sat in a carrier bag in the corner until I built the Pitts S2 and it runs really good.