Hello,
I have been thinking to post about free 3D Designs for King Air Aircraft simulator builders. Actually most of them can be used for other GA aircrafts as they share the same dimension. Depending on where you live, you can find places that can print your designs, or if you want to be adventurous, you can buy the printer yourself.
If interested, follow this link: http://www.thingiverse.com/revolution07/about
You can also download a free 3D design viewer from: http://www.123dapp.com/design
ermias,