I did some work with (as usual) powerpoint and generated some generic banners. One set has the M with red rays coming from it. The other is a series designed for you to mix and match the following Kanjis: Tiger, Dragon, Samurai, Rider, and Bushido. You can trade out the M for a Yin/Yang symbol. I am trying to find some other symbols but the point is it is a kit to customize as you see fit. Bear in mind that I did this without a figure to use as reference, but with powerpoint you have the ability to select the entire banner, group it, and size it as you need to.
If you want a copy of it, send me a PM.