Every pinball part I wanted to make I had to draw myself. I suspect most people just don't share (me included) since it's more 'tinkering' than anything else. We should start a repository here!
If you want to draw simple stuff, try TinkerCAD. I use it fairly often - I wish I had more free time to learn to use the more CAD vector oriented software. TinkerCAD lets you draw basic shapes, then combine (or subtract them) to form a final shape. Most the time it's fine, other times...nope. Its web based and made by the same people that make AutoCAD.
I made this plastic support for my Roller Games. Two seperate prints (one red, one black).
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If you want to try 3D scanning, look into these. No experience and don't know the resolution or quality, but might be worth playing with.
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Also, look into PLA + (sometimes called 'plus').