I got a couple (also called landscape) from Pioneer at the scrapbook expo. They were on special and had been made for Ms or HL and they were closing them out. But the guy said they still make them but just didn't have any there at the show. They are hard to find.
I really want the K and Co Heritage ones.
I love this size too. I use the 8 1/2 x 11 pps or cut down the 12x12.
I don't make too many in this format because the albums are scarce but they are out there.