Hi Miguel
The respeaker core v2.0 integrates the mics. why do you plan to attach the mic pi hat?
for the FFC cable, here is the datasheet for the cable, you shall be able to find it from internet. thanks.
30Pins, 0.5mm distance
<LINK_TEXT text=“https://www.amazon.com/30-pin-Forward-D … 30+pin+ffc”>https://www.amazon.com/30-pin-Forward-Direction-Ribbon-Cable/dp/B00W8W9YYG/ref=sr_1_2?ie=UTF8&qid=1541153178&sr=8-2&keywords=30+pin+ffc</LINK_TEXT>