Actually, if drmax actually means he has a D10 and not a D10A, then the autopilot cannot be used with that product.
The EFIS-D10A supports the autopilot, and as mentioned, servos are $750 each and mounting kits are about $75.
The EFIS-D10, which we haven't manufactured since 2004, does not support the autopilot. We do offer an upgrade from the D10 to the D10A, which would be about $1400, and then you could add servos to that. Give us a call for more details.
If what you have is an EMS-D10 (engine monitor) then that cannot control an autopilot at all.