Here is the Raptor aircraft. It is a huge long running project to build a prototype composite aircraft that is powered by a readily available automobile engine (An Audi diesel 3 Litre) and has a cockpit and cabin feel similar to how it is to be in an SUV / four wheel drive type of vehicle ie spacious.
The project looks to be about complete in terms of they have an aircraft put together and are conducting numerous tests of systems and some taxiing tests and engine runs.
I believe these planes will be available for purchase once the prototype is established.
You can see their progress on the Raptor Aircraft Youtube channel. They have many fascinating vids on there detailing many aspects of designing and building a composite aircaft.