You can always make your own d3 directives. Relevant "how-to" blog: http://briantford.com/blog/angular-d3.html
I'm the author of Radian. We're working on making it open source. If it comes down to it, I may just buy the IP back from the company I developed it for. It's to their benefit to have the thing open (more eyes). The only people who might lose out are the company's current start-up funders, but it's pretty clear that Radian doesn't actually have that much value as a closed source product.
> There are some contractual encumbrances that prevent us from open-sourcing it right now, but that may change at some point in the future
...only if it were open source.