When I look at a BPO or BPC in my home station, i can right click on the outcome and see all of the stations in taht region and therefore see the price of that items in stations sidderent to the one I am based in.
However if I then go to the materials to make that items and choose buy all, I can only select stations that are in my solar system.
Is there a way to select a station or structure outside of my solar system? for example I am in domain, so i want to see the costs from Amarr, but I cannot select that (from what I can tell), none of the items i need are in my hole station, or indeed any of the other stations in this solar system

Not with multi buy. You have to do that manually and for each item individually.
bleakā¦