How to get hold of something near german border? Like Karlove Vary?

[niem]

I am sorry if its wrong thread, my czech is that good

i wanted to ask, how do i get hold of something near german border? is there someone who can hook me up here?
if not, how should i proceed when i'm in the czech republik, in a city? do i go to a bar and ask? or just go up to a younger person and ask?
i know its not strictly legal to sell, but still, if you can give me some info, i would be grateful.

 

[niem]

if you would PM me that would be great.