So your charging money for something i can do for free with scripts you can find if you Google hard enough (and on my black an white laser printer?)?
I'm not saying that this is a stupid idea, it is just not the best idea to try to sell something that is so easy to do on your own for free.
Works kinda like selling toast, It works if your a restaurant, but most people would rather make there own toast at home and save money.
Edit: I can just pop on over to https://www.bitaddress.org and then just photoshop in a little logo.