Looking for some specific buttons...

Does anyone know where I can get a hold of buttons like these;

• A cartoonish looking cash register to be used on a button to link to an itemshop.
• A cartoonish looking arcade game to be used on a button to link to an arcade.
• Some image that could represent a forum, to be used on a button to link to a Forum Store.

I say cartoonish because I do not want to take a picture of a cash register and resize it, I want it to be a graphic that was drawn at some point

Thanks!