Help! Where to buy ladies shoes in large sizes???

I have big feet.  And I wear what is considered a rather large shoe size in Europe (although it is quite common in North America).  I wear a ladies US 10/11  which translates to a European 40/41/42.

Here's the weird thing:  I'm having a heck of a time finding anything for women above size 39.  What's even weirder, if I'm looking for a casual shoe or a running shoe, they will bring me a man's 40 which is HUGE.  A man's 40 is like a man's US size 10/11, which is waaaaay bigger than a ladies US 10/11.
What I need is a ladies 40/41/42.

So, I'm walking around in some pretty old shoes, because I can't find things in my size. 

So, if there's anyone out there who lives in Croatia, or visits Croatia often, and knows where women with large feet can buy shoes.....please leave me a message here.  I would be very very very grateful.

Hvala puno!