What you are asking about is a "Double Faced Mirror" deck.
http://www.penguinmagic.com/p/S17883
Unfortunately, as you probably have noticed, it has been discontinued.
Since this is the case, I can see that you have at least three options that come to mind immediately.
1.) Do a Google search for another vendor that has the deck.
2.) Learn to split cards and make your own gaffs. Not that hard, just very time consuming.
3.) Send PM an email and see if they have a deck 'laying around' that you could have/buy.