Just the jumpers? Or if you're after a board _with_ the jumpers then I found these: Jaycar https://www.jaycar.co.nz/duinotech-leonardo-r3-development-board-for ...

Saw this one on twitter and thought it worth sharing on Gadget Master: a screw version adapter for the Arduino Nano to help with prototyping, and to avoid soldering... The 'with headers' option is ...

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