I have the same problem. I want to know if anyone knows a way to host a server with IPv6. But I guess nobody does.
There was a post sometime ago here, where one of the ED-Team members said that IPv6 hosting should be possible, but I have no clue how. I tried every imaginable way, but never succeeded.
I don't want to pay several dozens of Euro just for a virtual server to run DCS on, because that one has a dedicated IPv4 address.