Inventory Pro replied to me in their forum. On November 27th Jorisshh said:
<blockquote>I currently don't have any plans to integrate Inventory Pro with ORK, simply because of the lack of time. You could of course ask the ORK Framework creator if he has the time to integrate it into Inventory Pro (you never know..)</blockquote>
Opsive is willing to improve integration between Third Person Controller and ORK, so he should be willing to help you integrate Behavior Designer. On November 25th Opsive said in the TPC forum:
<blockquote>I'd still like to :) There are two parts to it - gaining a better understanding of how ORK works as well doing the integration. Both of these can take a lot of time. I base the integration updates on the popularity of the integration. So far I haven't received too much feedback on the ORK integration - but that of course may be because it's only a character and camera integration.
What we could do is work together to improve the integration. This would make the integration even stronger than if I were to do it by myself because I'd receive input from an actual ORK user.</blockquote>
I have been too busy to get back with Opsive, but you should definitely contact him.