I was on the search for an alcohol based spray in the US. I found Rock Peddler (MA, USA) and have used their spray for a little bit. Shipping was a bit excessive, even two states away, but since then I searched Etsy and found 1 micron diamond powder. Looked up videos on how to make my own spray and it's super simple. If you can't be bothered and have some extra money laying around, order from Rock Peddler otherwise I would go the etsy route. Either way you'll be set for a while.