Based on your pictures, these 3 blocks are solid as red colored circles. They are formed from slots inside the tool. Therefore they are not able to bend as per your info. Furthermore, there are 3 small ribs on the back of each block which make them very solid.
There is no way to use injection to make these 3 blocks to deform. Injection is only be able to make the whole part deform, which will cause your part to be out of spec.
Nonetheless, if we get your PO to run production, we shall try. But very slim chance to make these 3 blocks to deform / bend down.