Thanks again everyone for all your assistance.
Regarding the Menards comment, when I lived in MN I used to stop at Menards and even worked there a long time ago. Since I now live on Left Coast I believe I'm a little out of range from the closest Menards. I do miss them sometimes as they carried items I couldn't find at any other hardware store.
**UPDATE**
Last night my husband and I went to Home Depot to get some of the supplies for the coop and I found the metal roofing I wanted, in the color I wanted, right in the store...hooray! It's a 3ft x 10 ft. piece for about $30, which is well within my price range, is the right size for the coop roof and will fit in the Eurovan for hauling it home. I will post photos once the coop is all finished, which will be a week or so because we're just pouring the concrete for the support posts today.
Thanks again!
Lydia