Packaging for a confectionary cream

We are intersted in packaging for the confectionary cream.In particular,we need unprinted 3 side seal packs.The material specifications are
1).PET 12/PE 100
2)PET 12/PE 70 with internal pack made of PE 40. The pictures are attached,please have a look.
The size is 500mm*430mm. There is also a hole for the hatch (the customer will insert it himself).
The order quantity is 20 000 pieces per month.