[Milsurplus] Dzus fasteners info wanted

[Dave]

G'day all,

I'm looking at fitting post ww2 aircraft radio control boxes into metal
panels. These are ones with 1/4 turn dzus fasteners. Can anyone tell me what
size (or part #) dzus springs (or dzus rail?) I need for this size stud
(appears to be .218" diameter) and where does one buy these in reasonable
quantities, please?

I think I can drill about a 1/4" hole in the panel for each stud to pass
through and two smaller holes in the same plane to mount the spring on the
underside with rivets. Is this the way to go.

Cheers
Dave