We do not currently carry any spray tips specifically for attaching to the JD-9 Gun, however we do carry the Masterline MAG-1 gun that comes with a variety of spray tips and is very similar to the JD-9.
Per the manufacturer the Precision Sprayer JD - 9 Style Adjustable Gun is not compatible with B&G Sprayers. You can take a look at the Robco QCG Gun instead.