Hello everyone !!
Concerning the Contrast Paint sold out problem :
-Warhammer Shop around the worlds should all have full stocks !
-FLGS should have contrast paints as well (if they stock GW products)
Still you should get there early next Saturday if you want to grab contrast paints in your local games store ^^
Also expect to have all the contrast paints back in stock on Games-Workshop.com very fast (ish)