I had a 64 pad just like that! There was an article in a N64 magazine from long ago showed you how to remove the backs on the controllers and swap them round. Only thing missing on mine was the mario sticker. Good times
Even a nice paintjob can't stop the US SNES looking terrible. I've always wondered why they got a completely different shape console to the rest of the world. Looked everywhere on the internet for an answer and found nothing.