Well, I'm sorry if it's the wrong part, but it is labelled as an A1000 button.
It probably needs rotating 90 degrees (printers like to start printing on a big flat surface) but a competent service should be able to cope.
A more expensive, but finer material, to print with is UV reactive resin. It produces clear or translucent prints. You might want to consider that,
As for the cosmetic decision, it's yours to make. After thinking about it, if you've changed the PSU, then making it look EU does make some kind of sense.