This strainer for your shower is a replacement for VIGOUR strainer that seems hard to get as a replacement. It is 46.2mm in diameter and measures 44mm in height (plus the handle). It might fit other in-floor shower systems if they use the same measurements.

Printing is a bit tricky - if you print it upright, it uses a lot of support. I haven't tried printing it upside down, which might be more economical.