They have one available through Naturescapes.net that is more expensive, but has been available for awhile. I have one, used it on several trips, and it is fine. Now that I look at the Mydigitaldiscount link, it looks like the same charger! (though I can't promise that, haven't even seen one of the MDD ones except in the ad. Here's a link to the NSN one:
On casual inspection, it looks like the brand label on the pic at MDD is the same as the label on the charger at NSN. Anyway, I can tell you that the NSN one works well, for whatever taht's worth!