Where's it broken? Can't see a break. Can we see the broken pieces apart (or the other part to be glued)?
Not enough info so far to be able to offer any suggestions. Don't know what you mean by a posh fit, and only guessing what you mean by a "rose", that is, maybe it's the bigger diameter end of the part with multiple passages as shown in your photo.
Maybe your terminology is 100% clear locally where you live, but it isn't clear to me. I've been designing valves and plumbing components at different times for several different fluid handling firms in North America for many years, so I can probably help, but need clear info to do so.
Edited By Jeff Dayman on 12/04/2018 16:08:05