The Gameboomers review tells you where it was available at the time.
InteractCD is sadly no longer in business, but the developer website is still onlinehttp://www.anima-ppd.com/index.php?page=10&menu=2
It looks like they sell the DVD because they charge shipping.
You should try contacting them before ordering and ask whether they still have any in stock.
The date on the website is 2015, which is 4 years ago, so it's a good idea to check before trying to order.