Unable to find a suitable case for a loose 6502 second processor, I ended up with the perfect solution. A 6-way DVD case! The internal "pages" had already fallen out as the pins that formed their hinges had broken, so this was the ideal space!
Update - a suggestion in email pointing out the glaringly obvious - I can simply print a dvd cover label to slip in the case! So a quick 2 mins in photoshop produced the following. Note, I've now got one of Sprow's ARM7 co-processors in a box, too!