I can do prints up to 100 mm cube. I need a 3D CAD model (or accurate measurements) to be able to print such a part. You can sometimes find ready-made files for free download at Thingiverse:
https://www.thingiverse.com/
I charge only for the cost of the part, plus postage, and round up a couple of bucks for my time (and the beer consumed while printing
) - about $10 - $12 for most typical parts if the 3D file is provided or easy enough to generate, maybe a bit more if I need to spend a bit of time to create the CAD model.
PM me if interested.