Starglow --
Like you, I found that there are no male 2mm ribbon cable connectors to use to connect to the HS3. I used a PCB mount Molex 87832-1420 connector.
For another project, I came across this board, which is a pitch adapter:
https://oshpark.com/profiles/smartperson
Due to their size, they are relatively inexpensive. The configuration on the right shows a pair of them ganged together to create a male to male 2mm adapter.
The board design was published, allowing OshPark to sell them to whomever wants them.
The through-hole 14-pin 2mm male connector is fairly easy to find (these are Sullins SBH21-NBPN-D07-ST-BK). After clamping the two boards together, pins from a standard 0.1" header were inserted, soldered, and trimmed off. Not real pretty, but it works. If you have the resources, you could simply make a small male-to-male board that is smaller.
Again, I hope this helps.
Don