Pay no attention to the rest of this post... I see now that you wanted a REAL button!! lol
I searched on Etsy, and found some neat buttons... and you might also click on the last little picture in this post... that site has MANY neat THINGS for BCA.
I searched on PhotoBucket, and found these:
ALSO... There is a FREE website that I go to, where you click on a little button, and companies donate money for every click. There's one for Breast Cancer too...