I haven't heard anything. Did you try contacting Liz on her Etsy page.. maybe she's only doing them as single, custom orders now?
I contacted her last week. She's a bit backed up on orders and she has another project going currently. Bags should be available for order at the end of March.
If you're looking to buy a bag with extra room for a reservoir, I believe she has some on hand, but don't quote me on that.