i don't know if it was discontinued, but if the item is not on vuitton.com or eluxury, you can call 866-VUITTON and they will locate an item for you if it's available.
I was in the Portland LV boutique earlier this week and asked this exact question and she looked at me like I was nuts and said NO, it's not being discontinued. Don't know why it's not on eluxury anymore? I am thinking they rotate the new and hottest selling stuff on there because they carry such a small portion of what is really available.
I got one in the first season they were released. I noticed it wasn't in the book any more so thought it had been discontinued. Looks like there are still some out there though.