Metal Porch Door Lock Prototype

I need a prototype for a child safety lock mechanism for a screen porch door. Requirements: - Lock can be operated from both sides. - Rotating metal arm design to secure door. - Metal dowel through door... (Budget: $250 - $750 USD, Jobs: 3D Modelling, 3D Printing, CAD / SolidWorks, CAD/CAM, Mechanical Design, Mechanical Engineering, Product Design, Product Development, Prototyping, Solidworks)