As far as I know there is no comprehensive list available. Having said that, just about any plane offered by most of the major vendors will be more than legal. The only exception are the pattern type planes that clearly are not really scale planes.

Also, the AMA scale aerobatic rules do not require that the plane actually has competed in an IAC contest, only that it is a plane known to be capable of aerobatics within the airspace known as the "box". Also, no turbine aircraft.

Bill