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).
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.
Also, look into PLA + (sometimes called 'plus').