Hmmm. This could make an interesting electronics project...
These sensors could provide the core functionality for a homebuilt 3-axis autopilot. I couldn't use them on a certified plane but they could be used on a homebuilt.
Take the outputs from this sensor, interface it with a GPS NMEA 0183 output, put the results into a simple embedded controller, and use that to send outputs to one of the larger RC servos to drive trim tabs. The whole package could be put together for perhaps $1200, perhaps even less. Or, it might be possible to interface it with an existing software package like this one. You could have the functionality of a $20,000 autopilot for under $2,000. Cool.