I saw something exactly like this at a cake dec shop. They were cookie molds though similar to cupcake sheets. At this point, I can't remember if they were silicone or not. Now, That I saw your pictures I am going to go back and look and get one. I will let you know next week unless you find out sooner. I remember thinking that they would be great for cookies because they were not as deep as cupcakes. HTH
To follow up, I was at a Michael's store yesterday and popped into the Wilton Asile. Apparently Wilton has a silicon mold in this shape, It was a little on the deep side which means you just don't fill it up as much. I measure it against the cupcake liners and its about that size.
You can go to the Wilton website to see it. HTH
Virginia 323.253.8213 www.urbanainez.com He is the man of my dreams, my prince; He gives me the desires of my heart, He completes me. His name is Jesus