3.5" Polycarbonate Support Ring

I need a circle made of PLA to fit over a 3 mm wall-thickness aluminum pipe. Requirements: - Precision in dimensions is about +- 5% I'm looking for programming for ongoing projects, and this is just a test case... (Budget: $30 - $250 USD, Jobs: 3D CAD, 3D File Scaling, Slicing & Print Preparation, 3D Modelling, 3D Printing, Mechanical Engineering, Product Design)