Behr Orion Gray is close to the Zynolyte when a satin or matte coat is added (the paint comes in gloss). This is from a line of aerosol paints found at Home Depot in the US.
In the photo below, the Orion Gray is gloss out of the can; I sprayed half the sample with Testors Dullcote lacquer since the Zynolyte dark grey primer sample is matte, and matte paints tend to look lighter than their gloss equivalent.
There is a fairly good match between the Orion Gray and Zynolyte, though not necessarily the Wand P1. A satin rather than matte coat would probably make it even closer to bare Zynolyte.
(Top two photos are indoors, with light through a nearby window.
Bottom two photos are outdoors on a cloudy day with bright indirect light.)