I made this one out of a Madcatz SFIV stick as a gift for AKG.
I got the artwork from minitokyo and cropped it down using photoshop and a .psd template. The original artwork was a MAJOR pain in the ass to remove, if I had to do it again I'd make sure to have some glue remover handy. I'd also do a wet application of the sticker, as it came out kinda bubbly.
I replaced the stock buttons with some Sanwa OBSF-30 buttons.
I used this blog post as a guide.

