Well, it took me hours of effort (okay, 3 seconds googling "rubinacci pocket square"). Try http://www.marianorubinacci.net/eshop/product.php?id=543&lang=2
It's a neat pocket square, but at 70 Euros - call it about $94 - I probably won't be buying any.
Thanks, for some reason it didn't show up on the first page of my search. I am logged in to my google account though so maybe it thought that wasn't what I was looking for?