Dynamic proxies??

I suspect the answer will be "patches welcome" but... Has anyone ever thought of having a similar module as dynamic clients where you can pull proxies for external realms from an external source using unlang such as sql or ldap?? I have an interesting use case where I am looking to replace an existing radius proxy server with FreeRadius that has a lot of downstream proxies. So far the the best option I have is to copy the proxies.conf across all the instances and HUP the config whenever a new realm is added or removed and wondered if there was a smarter way to do it. Cheers Peter