Managed to find a legible picture on eBay, so I was able to update it and do some tweaks. The picture on the back is a placeholder.
I'd like to use the original art, but I imagine it's going to be terrible in a scan due to color saturation and age, so I'm probably going to use different art (not a HUGE deal since I don't think NES controllers were sold in singles, so this is already custom).
Any suggestions on what art to use? I don't like having too much empty space. It could be one long vertical image like shown here, or two images of the same proportions spaced apart. That's really all that's holding me up at this point.
I'll release the final result as well as a PSD in my Mediafire account when complete. I don't think TCP has a section for stuff like this, so people will most likely have to hunt this down on the forums in the future.