How to quickly manufacture spare parts from plastic

I need to make several plastic prototype parts for a presentation, so I decided to find out how to do it. What are the options, and how long will it take to manufacture the parts?

When I can’t find the necessary plastic components for my equipment at my factory, I manufacture them using SLA 3D printing https://www.upsideparts.com/3d-printing/sla This technology allows me to quickly produce various parts and components. All I need to do is approve the layout and confirm all the necessary dimensions for 3D printing.