About the probiotic: Do you have the possibility to order something online from iherb.com? You need a credit card. If you order between 40 and 80 dollars, shipping to Europe is just 4 dollars (also to Bosnia, I checked it out). Since they do not ship on ice to Europe, they advise to buy a “stabilized” form of probiotics, I don’t know what that means, they have a category of those:
(Able, if you read this: What are stabilized probiotics and are they ok to use for those living in Europe who can’t get hold of high-strain probiotics here?)
The one I’ve ordered is Dr. Mercola Complete Probiotic which contains DDS-1. Maybe you could order a probiotic there? If you for some reason can’t, I could do it for you in our kefir-exchange-plan and send it to you.