Don't know if this is what you are looking for, but Garmin has a 430 & 530
simulator which you can download from their site. I found out about it from
my CFII - he felt it would be a good aid to practice since (eventually) the
430 is the model they will be installing in two of their planes.

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Good Flights!

Cecil E. Chapman, Jr.
PP-ASEL

"We who fly do so for the love of flying.
We are alive in the air with this miracle
that lies in our hands and beneath our feet"

- Cecil Day Lewis-

Check out my personal flying adventures: www.bayareapilot.com