I haven't seen it at Aldi here. I'm sure they would sell it in Denmark, if they have Aldi there, but there's probably not enough demand here.
QODK, what a kind thought! But I'm sure they would complain at jars of pickled items in your hand-luggage - and you might get exciting explosions if you put them in the hold.
I did look at Ikea a couple of weeks ago but nothing there except sild.
I will try danishfood.net, thanks for the link.
Also thank you Longbyt for giving me a new thread.