I've given small (very small) engraved jewelry boxes for keeping the pin before -- I haven't given this one (so I can't personally vouch for it), but they were similar:
http://www.silvergallery.com/sterlin...jewelry-boxes/
I found a cute footed one at a gift store, but I didn't see one like it online after searching briefly.
*ETA: Here are a few pages of other choices on the same site (I haven't ordered from this company, so no endorsement implied):
http://www.silvergallery.com/sterlin...wel-boxes/?p=2
**ETA (again) -- just had to google around -- and saw these already engraved (a number of choices and styles):
http://www.almostdemure.com/pinboxes.html
I really like the DG and KKG Limoges boxes (pricier) -- no other GLOs offered in the Limoges though.