This one will be back, although the engine was badly damaged in the end, I found an older, but seeming suitable engine from a Poulan trimmer, which I got for $10 at Tiny's.
I need to do some slight modification to the drive end, as the cable tip is different between the two, but it should be able to do the Job.
I'll get some photo's up soon of the new engine, and the shaft (which is all I saved of this during the move)