What collection can be complete without Seiko's authentic reproduction of Aki's Wrist Holo?  ... Well, mine... anyone not willing to pay $300 for one... Um... Y'know, people.

Never seen one, but from what I know: It was first available only in Japan, then released worldwide.  It's a limited edition - there are only 1000, and each has its own serial number.  It's release price was around $170-$250, depending on where you were when you found one.  Probably higher in some places.

People who liked the movie, and some that didn't, liked the design.  I think it's kinda neat (not sure I'd ever wear one, but...).  One could say that, in the film, Aki's holo was made by Seiko, so I grant them the artistic license when this isn't exactly the same design as hers.  It's certainly interesting enough on its own merit.

I don't know where they were for sale initially.  But they are on eBay sometimes.  However, in light of the facts that they are limited edition, expensive to begin with, and have been out of production for several years, be forewared that any potential find is likely to be pricey.