HBO Now Fire TV APK?

i see that Fire tv now has HBO NOW.. but the Shield TV is still lacking this APP.. is there any way to extract the Fire TV specific APP and side load it on to the shield tv? im sure that the Shield TV is more then capable of using the apk... i dont know if its compatible and i wonder if any one has posted a download site for the apk yet... this would be great on the shield tv..

any ideas?