The nuts are called Speednuts so a Google might help.
They must be available elsewhere
I take it these are for a bike fairing. The panel nuts will be easy enough to find, but stainless shoulders with right shoulder depth could be tricky. I bought some for another porpoise and they were eye-watering in stainless... was only one place I could get right depth.
Might be was well to stump up for the OEM ones, there can't be many of them to buy.
Why not make some?, 6mm stainless tap bolt with the head of your choice and slip a collar over it made to suit your purpose, with a small lathe it would not take long, or you might even find some stainless tube that just needs cutting to length for each one.Collars could be locktited to bolt to make it into a unit.



