unbind some stuff

I get the problems that might come with allowing loot and advancement items like LI runes to be unbound to account, but theres got to be a better way to invite friends to join the game and not take forever to grind a character into end game status. I'm sitting on a ton of extra resources that I'd like to use to help a friend advance. Is there any way to allow us to share account bound items with a single friend, or within a kin, or anything else? I'd buy that option from the store if it was available