I really can't believe your posts don't get more hits!

I'm totally in mind with you about growing mulch

I have some posts in the pipeline about Tropical mulch species and also about a grass based sustainable polyculture much along the lines of this article

Have you looked into other Miscanthus sp for your mulch needs? There are many. I think it will be very productive for you.
M sinensis might be even better than M giganteus , as you don't really need long canes, it's leaf blades that make better mulch