Famicom Controller Business Card Case
With or without speaker
Banpresto has for sale some spiffy business card cases that look like Famicom controllers, either with or without built-in speaker detail. There is an inner divider that creates two separate compartments.
Business card CHECK!
Also available are Pac-Man themed business card cases.
Pac-Man style also available
A quick search through your favorite search engine should result in several online shops where these can be purchased. At about $10 US each, they are a pretty inexpensive pick-up.