Well, I have to guess it is made by Score, as it's hard to tell just by looking at the product. As 'Score' was the biggest word in print on the packaging, I'll give them the credit.
It's a well thought out case, holding up to 8 UMDs. I say 'up to,' because there is, included, an insert that will hold two MS Duo cards. It is the exact dimensions of the PSP (tested by placing in my Logitech PGP) in all but the height. Wagering a guess, I'd say the total height of the closed unit is about 50% greater than a PSP, roughly equal to that of a closed PGP. I bought this item at Wal-Mart, but it appears to also be available through Gamestop.com.
I have to say this is what I've been looking for. Aside from not holding the PSP headphones, or the Sandisk MS adapter, this fits all of my needs (the two products mentioned are now in my previous mode of UMD transport, the Altoids tin). While it is still inconvienent to carry three things around, I could ditch the Altoids can and go with two PSP-sized items rather easily in a briefcase or backpack. While not offering the portability of a PGS, it does give you a good alternative if you already own a PGP.
Rating: 4.5/5
+Up to 8 UMDs stored securely
+2 MS Duo slots (in place of 1 UMD)
+Tough hard plastic shell
-No storage for anything else