Does anyone know where I can get an air assist nozzle for a 20mm diameter 25.4mm (1") focal length lens?I purchased a couple of 25.4mm lenses to experiment with higher detail engraving of photographs but have been unable to find the appropriate nozzle for the lenses.I checked with Light Object and also checked ebay. Both have nozzles for a 38.1mm lens but nothing for a 25.4mm lens.