I called an aviation supply house today. I'm told that you cannot get a
Garmin 1000 for any price, and that they do not intend to market to the
refit market. So the answer is .... no.

I'm told an Avidyne would not recieve a field approval from any field
office.
It would need an actual STC. This supply house says they are on good
terms
with the local FAA, but there is little chance of success on a field
approval.

The Chelton Flight Systems units seem at least as capable and invasive as
an
Avidyne and they have an STC for something like 650 models.

I have no idea why the difference. Anyone?

Chelton got the STC covering all the aircraft models because of the Capstone
program in Alaska.