How about this purpose built plave carrier. Designed for a Pipistrel Aircraft but will fit anything, sides fold down for the wings to be fitted, electric winches, and long loading ramp will take just about any plane. Dual airbag suspension with special shocks.
I can get you the number if interested, there is a sign saying $7,500 on it. Its just come a distance of about 2,000 kms so everything must be working.