Bick
I believe DeVilbiss acquired Aerograph some time ago (some of their AB's were sold as 'DeVilbiss Aerograph'). You might try to contact a DeVilbiss seller and check. TCP Global sells a maintenance kit (includes nozzle) for the DAGR Studio ab. Don't know if it will help or not.
DeVilbiss passed the rights on some time ago & the current owner (Artcoe) seems to have stopped production - last I heard they were trying to dispose of their remaining spares.....
The model number quoted (PIAB 2103) is an alternate for the BD-130, does it look like this?;