Lots of PPS2 lids & liners on Amazon as well as some PPS1 stuff.
I have that gun (although it came with PPS1 nozzles, cups and liners) and it's been working well for me. I agree with Mark that 3 hours between coats is a long time. But depending on pot life of your epoxy, you can put a plug on the lid and stand it upside down so the filter is wet, and reuse what's left in the cup. Definitely clean the nozzle immediately after use, or you'll be tossing it in the trash. They can be reused quite a few times. I tried to reuse a liner and lid once and made a giant mess, so haven't tried that again. Having at least two outside cups is nearly essential, so you don't have to stop and remix in the middle of a job. I have 6 of the standard size PPS1 cup and locking ring, and have another mini size set coming today (those are real cute, but handy for small jobs.)
Mark's suggestions are right on. The 3M half mask (or even better the full face mask, assuming you don't wear glasses that would impede the seal) works well with VOC filters. Keep the filters in a plastic bag between uses, and they'll last longer. If you start to smell paint with the mask on, either the seal to your face is bad or the filters are used up.
FYI, you can get PPS1 nozzles that will fit your gun and go with the PPS1 lids and liners.
