Will there be a new davinci shop CE that can be bought by mana prisms?

To my knowledge there are only a total of 5 Mana Prism CEs. Mona Lisa, Personal Training, Personal Lesson, Chaldea Lunchtime and in JP Chaldea Teatime. I assume you know what all of the others do so I'll only explain Teatime. In a similar way to Lunchtime it increases bond gained, but when you are using it when it is equipped on a friend's servant it increases the bond gained by 15% rather than the 5 it normally gives. Normal MLB Lunchtime is 10%. If you really wanted bond you would have your Chaldea Lunchtime and 2 Chaldea Teatimes for a total of 30% extra bond points.