Arrange incoming data in pairs in simulink

Hi everyone. I'm trying to acquire digital data sent by a PIC microcontroller via a DAQ board, the microcontroller sends some information in sets of 8 bits numbers, which need to be rearranged to form a 16 bits numbers by merging. To do so, my idea is to make an array and make a column vector every time two 8 bits numbers arrive, but I can't figure out a way to do it, I tried using a buffer but I couldn't get it working. I also tried using an Embedded MAtlab Function block with the same result. Any ideas?

Thanks in advance!