Even though Prusa is a Czech company, most of the parts in it are still going to come from China.
Realistically most of the parts in these machines aren't really made anywhere else.
Also if you are really adventurous the Prusa design is open source so you can build a lot of if at home. I doubt you'll be able to get around buying at least SOME Chinese parts (namely stepper motors, stepper motor drivers, and the logic boards to control it), but for the plain hardware and frame you could probably avoid them (hell the main frame on a Prusa can be cut out of plywood).
Thomas Sanladerer does a video series where he builds such a clone: