Try lookimng at
www.justengines.unseen.org look at the ASP but also check out the LEO .37. It's in the same frame as the .32 and has more power than most 40's. Paul is easy to deal with. do the currancy and taxk conversions and see what you think? I bought three engines from him.
The Megatek .37 is the same engine except with the .32 carb instead of the .40 carb.
There is also a MECOA .32 that is the same engine except that it is all .32
These engines are really small. They compare in looks, power, weight etc with the OS 32SX.
Jim