I can scan to 0.1% accuracy.
For printing, you might want to try SLA instead of FDM.
SLA uses a resin and provides a more accurate and stronger model.
Printing time would be 4+ hours depending on the design.
Take a look at my hub “Legionnaire’s Hub”, I have a few pictures of SLA models. I can also do a flexible print (almost like rubber).
Best of luck