MS Word - Mail merge show multiple records per page if key field is the same

I am trying to set a mail merge document with the data below. I am trying to populate multiple records in the same page if the customer no is equal.

Example:

Assuming I have the above excel file (as the source file) containing the above data I want the mail merge to show the following:

Page 1: Dear Bla Bla Bla.....

Page2: Dear Bla Bla Bla.....

Page3: Dear Bla Bla Bla.....