If you do end up needing to go retail, you might check out lightsportusa.com
I'm not affiliated, but saw their ad on an aviation website advertising the lowest prices on Dynon stuff. I ordered a few things from them and can confirm that they were the cheapest out there. They had my order drop shipped direct from Dynon the day after I placed it (they're an authorized distributor).
Rebuilt RV-6A N94CR
RV-8 In Progress
2017 Dues Paid