I've been trying to buy an ODB connector for my diagnostic tool for quite some time. This connector is essentially just a bunch of plastic and should be a very cheap item.
I saw that part on eBay or other automotive accessory shops for 15-30 euros. That's crazy. Then I can continue to manually push the connectors into the sockets.
However, it would be nice to have a connector, as I have now professionally etched and assembled the circuit board.
The connectors that come with our kits are, of course, high-quality and feature strain relief and kink protection.
You won't find anything reasonable below the price you mentioned.