Looking for stackable header connectors

I hope this is appropriate thread. I am working with microcontroller projects and need many stackable header connectors.
I've bought some on Ebay and am disappointed by the quality. To make a single row of >> 10 I have to file the ends on two adjoining connectors so they fit. The pins are so thin they wont last. Good new is I spent less money then a decent cup of coffee and a doughnut would cost.

I did find an earlier thread here, and took this photo that was used. I have emails to a few companies but hoping someone here has PNs and sources.

If it's not obvious from the photo, the connectors I want are single piece connectors that can plug into each other, and yet sill allow for soldering or wire wrapping.



Thanks

The pins aren't very thick but they work
Arduino I/O Interface Headers $0.30
10 Pin headers for Arduino, UNO, PRO, MEGA shield boards. These long pin headers are the correct height to provide stacking and clearance for most shields.
H: 19mm WT: .002
https://www.mpja.com/Header-Connector-Long-Pin-10-Position/productinfo/31053+HC

looks like a Samtec part
https://www.samtec.com/products/phf

https://www.samtec.com/products/phf#related