I have used
Materialise, which are based in Belgium I believe, and they have very high end printers and will easily print the sharp edges. Theirs can do 0.3mm wall thickness though, and now that I look at your link they don't appear affiliated even though they share the same name.
Much this depends on what type of printers the manufacturer will use.
I would add some more supports/ribs/struts or whatever youc all them in English, eg something like these along the walls and around the standoffs:
This means you can make the walls thinner and the part cheaper. One of the advantages of additive manufacturing is that it allows you to design really elaborate strength adding details and supports and make the overall shape smaller and cheaper.