Best way to link from free/lite in game to full version....Application.OpernURL problem...

Currently for Mac App store links if you use Application.OpenURL to link to the itunes web app data for your app-- hoping then of course the user will click on the "view in app store link" from there, the user will get a tutorial page from apple about the app store instead of the app store launch-- never an eventual link to your full version product with app store app opened. Instead of the app store app launching with the given app in focus, you get: http://www.apple.com/mac/app-store/?id=418377446

I've done several tests including downloading other free/lite software from the app store. All the links go from the lite/free app to web itunes info/ (www.itunes.apple.com...) to the previously mentioned app store tutorial page from apple. Nothing links directly back to the mac app store currently.

Ugh. Is there a way to open the app store app from within unity and point to a given product? If so how. Seems like a plugin would be needed...possibly breaking the agreement with apple-- opening one app (the mac app store) with another-- not sure. Other solutions?