Finding Paperback Release Date and Sorting Physical Doujin

Now that the books have moved from the store entirely to the main site, it's much harder to find the estimated release date for the paperback. Each book page just has a "buy now" button because the digital version is available, but no way to know when the paperback will ship. This makes it harder to split pre-order copies and already released copies into separate orders so that the released ones don't get delayed.

Since physical doujin releases don't happen too often and tend to be very limited quantities, it'd be nice if there was a way to sort out physical versions on the doujin page to more easily find them. Also, some sort of way to be notified when that sort of thing becomes available? Thanks.