John Burlage does not sell to individuals anymore, so you would need to get it thru a distributor. Looks like it's still out of stock at OPGI and most places I checked. A couple months ago, I tried to buy the Parts Place paint and couldn't get any of that either. I ended up calling Camaros Plus, in CO and got a quart of his paint for my '67.
He recommended and I bought a spatter gun by PMT on Amazon. It has an adjustable nozzle to spray the base coat and then open it up to replicate the spatter.
https://www.amazon.com/PMT-RA1-T-Und.../dp/B00CBIJT42