Oh boy... that's one thing I've been scare of since day one i got the phone.
anyway.. I just did a search here from China, on taobao (the chinese version of ebay , own by ali, in case you don't know)
they do have it here (not sure how legit it is).. but it's like 150+ euro.
Anyway.. i am sure it will make it to aliexpress very soon. good luck
(btw, mix2 and 2s screen has different listing on taobao, and price are also different. so i assume they are different? )