I too have a '06 Seneca and I have the correct paint codes. These codes did me no good as Jayco outsourced their painting to a large volume local RV paint facility. They use SIKKENS paint.
I live in the Los Angeles area and NO one here handles SIKKENS paint. Few even heard of the product. It is a European brand and the only distributor is out of Georgia. It is sold only to very large volume paint shops. After contacting over a dozen auto paint suppliers, and coming to a dead end, I had my existing paint color matched.