Here are the diameters x height that I have. I went with ***
6.65mm x 7.25mm
6.63mm x 6.62mm
4.95mm x 7.52mm ***
4.88mm x 7.46mm
6.60mm x 5.22mm
6.79mm x 6.67mm
Thanks, Marcus! That's very helpful. The ones you went with for your replica here seem pretty much perfect, being on the narrower side.
I'm sure there is a market for some replicas, roygilsing, particularly for that narrower size for people making Rebel charge replicas. The same ones are also used on 2-1B's head (on the bottom of the Shure microphone grill used for his mouth). Vader's ANH belt boxes have 12 of the same thumbscrews attached too, although those seem to be more like the 6.38 mm diameter and 7.63 length type. These things probably show up on a bunch of other props too, so I think you could certainly find some buyers!