I got Lacrosse/TechnoLine Weather Station WS2355 and also few cheap 433Mhz receivers [1] and antennas for them [2] but I have found out that they have really small range, they work only in same room upto 3m/10ft, anything beyond that they stop receiving data when connected to arduino...
Original WS2355 receiver works through thick indoor walls upto 30m/100ft, which is quite impressive.
This is original receiver in WS2350 weather station, thin wire is antenna:
https://secure.flickr.com/photos/valent_turkovic/13380962533/in/set-72157642850005724
I'm looking for good 433Mhz receivers that I can connect to Arduino and collect data from weather station, but one that has good range, because these ones I got are really bad for anything beyond few meters...
Are there shops that sell finished 433 rx modules, or some ebay shop that sells internationally? Ebay is definitely preferred because of price and also easy worldwide shipping. There are quite few US based shops that have crazy shipping prices, so rest of us outside of US can't use them 
[1] http://www.ebay.com/itm/121117930415
[2] http://www.ebay.com/itm/371027094605