There is a difference between 1.2 and 2.0 ircd protocols, you are going to either have to write one yourself, in which case if you do, please submit it for review and possible inclusion, or wait for one to be written.
Unfortunately even closely associated projects like Denora and Anope can have different release schedules.
On a personal note, please don't think this is a rant, but you should always investigate support fully before upgrading to prevent this from happening. It's highly advisable to have a TestNet to test all new software on to insure things run smoothly before introducing the new software to any production network.