I went ahead and ordered a bunch for my DMD machines from cometpinball.com. The specific link is here:
http://www.cometpinball.com/DMD-GLARE-ELIMINATOR-p/dmdglare.htm
I have to say It works very well, almost 0 reflection. It will make the DMD dimmer, but I actually like it more now. It makes the black , darker and sharpens the images. adding some images below, before and after. I highly recommend these, it makes a huge difference.