If it is, I can't find it for some reason. Does it have a specific name?
I don't think it is. But you can call 866# and buy through them.
I've never seen them on Elux, but I just called a boutique and ordered mine. The technical name is bolt key holder (I think it's on the LV site somewhere). If they don't know what you're talking about, just tell them it's the Pochette extender.
I just bought one that was only used 1 time from a great seller on ebay. I saved some money and a trip to the mall., where I just would have spent more $$