Staub Rectangular Casserole
Wow, those are great!!! I can see why you're drooling ....
My suggestion would be to Google around, and if you can't find it anywhere (Have you looked on sites of retailers who carry Staub like Amazon?) , then contact StaubUSA through their website. A couple of days ago I wrote them with a query and received a very prompt, informative, polite reply from a real live person (not one of those auto-reply things) who answered my question specifically and even supplied links!!
I have to say, I haven't bought my Staub yet but am very impressed with the customer service.