Looks like EB Games have exclusive rights to IL-2 Sturmovik: Cliffs Of Dover standard and collectors edtions in Australia.
http://www.ebgames.com.au/search?tit...liffs+of+Dover
The prices are steep but about normal for over here. EB Games are a reputable mainstream bricks and mortar retailer, but I haven't really had that much to do with them so I can't really say more than that. I couldn't see on their website whether or not they ship internationally, only their details for shipping within Australia.