Hi, sorry for the delay in responding, but I'm only on here once a week (Friday mornings).
So, first thing I should warn you is that 16-contact is a non-preferred size in Datamate, and reverse fix is also a non-preferred jackscrew so you will struggle to find stock if you want low volumes with immediate availability. If you're buying volume to lead-time this should not be an issue. Sorry about this, but we have so many combinations for Datamate it is just not possible to stock everything.
For part numbers we are looking at
M80-4051642 for the female vertical. The male horizontal is
M80-5L11642MA.
Just in case, I also checked the Gecko-SL version to see if there was more likely to be stock - 16-contact is available in this range as a standard size. The female vertical with board mount studs for additional strength are
G125-FV11605F3P, and the male horizontal is
G125-MH11605M3P - both of these items are in stock at multiple distributors, so I would suggest that this is a better choice for immediate availability. You can see this stock if you follow those links to the product pages, and look at the "Availability" section.
We have multiple distributors that operate in China - also as we have stock here on the Gecko-SL parts, any of our distributors can purchase from that stock. You can see the full list of authorised distributors at
https://www.harwin.com/contact/find-a-distributor/.
If you have any further issues, do please contact one of our Experts for advice.
Thanks! Wendy