Welcome to BYC!
I don't think anyone has plans for sale but maybe... I am positive there are quite a few threads about hoop coops where you could get some great ideas.
Use the little magnifying glass in the top right corner to search for hoop coop.
Hello Mark and welcome to BYC, You found an Amazing Poultry Community to be a part of with many great knowledgeable members, who are more then willing to jump in and help you along your journey with any questions you may have.