Hi,
Unfortunately, like you said, there is no M Series MH DDK support as of now. Also, it has not been determined when this will become available. Your best bet is to look at the MH DDK site for the latest information:
http://sine.ni.com/nips/cds/view/p/lang/en/nid/11737
Or, like you also mentioned, if you need this now you could use an E Series board. This are really your only two options right now.
I hope this helps, and have a Great Day!
George