Thank you for your replies. I have seen an article in Model Airplane News, where someone built retracts for his high-wing trainer, but the geometry is wrong for the Cessna. I will look through RC Modeler, and see what they have. I will also check some of the jet manufacturer websites and see what I can find, however I imagine that they will be expensive. There is a company that makes a 337, and the retracts to go with it, but the retracts are 500.00. I have been told that the service manual has some detailed drawings, but I haven't been able to locate one.