The anodized aluminum came from SAF in Redding CA
http://www.saf.com/ I ordered enough of it that it was free freight. Looks like their east coast office is in Atlanta.
I got 2 sheets of 4x10 .040 Clear Anodize A31 (SAFC204)
and 2 sheets of 5x10 .065 Clear Anodize A31 (SAFC204)
The .065 was a pain to bend on the hatch and the 5x10 sheets are nearly double the price of the 4x10 ones. If you can live with a seam then go with the thinner stuff.
The trim is Universal Molding 20-1305, ask your local RV retailer to order it for you and you can get 16' pieces for $30 to $35 each.
SAF was awesome to work with, they even sent me samples when I asked.