Re choice : I generally agree with entropy, buy once , buy good. My choice would be the good one too. But in case you are broke, if the 110$ make a real difference in your budget, fuck it, get the powerlifts, they will be much better than kobes. Also, from what Lance said, compressing heel starts making a real difference in the high-300 lbs loads. Discussed it with a dude in my gym too, he wears romaleos 2 and squats with perfect form 180kg full / 220kg legit half. He said he doesn't see a real difference from sneakers below 150kg. To further contradict myself and confuse you, i saw a huge difference even in empty bar squats, but i had serious form issues before while you don't. Also, that doesn't mean i wouldn't see that difference with the powerlifts too.
Re size: what entropy said , search a lot of reviews, get the average report on size, whenever i used that getting online shoes i got perfect fit.
Re sources : i told you again that there are some options in german and english ebay. Germany and England are EU members so there is no custom involved. I am not aware of your laws but it should be the same there. Shipping fee is not that much , mine was like 20 euros and it was UK to Greece , Germany to Romania should be cheaper.