They really are the same all around the world... I have to go to no less than three big box stores to get everything I need for a proper job sometimes!
Store A sells pre-cut Moeller bus bar and connector clips for the phases but not the neutrals (Moeller DIN-rail breakers with switched neutrals can either be wired using wire links on the line side or their bus bar, flat pieces of metal about 1x10mm with tabs that clip onto the bars for each terminal). Store #2 sells the all the clips (even a lot cheaper than store #1) but they don't have as much as a single stick of bus bar.
Neither of these two stores sells flush-mount junction boxes IP44 or higher (outdoor use). Store #3 does, but they don't sell any of the aforementioned stuff because they seem to be part of a German chain and only sell the German Moeller range, where the switched neutral breakers are 2 modules wide instead of 1 1/2, which means the cheap pre-cut bus bar commonly used for single pole breakers works, but they don't have the neutral bar to go with it (Store #1 occasionally sells it, but no more than that).
