I picked up Ploom's official pouch for the Pax 1 from an LHS about a year ago, on clearance for $5. It is THICK felt and actually keeps the smell in more than anything else I've found. I haven't tried the caps, but I just use the felt pouch for the P1 with the P2, and since it's so much smaller it fits in there nicely with the end closed.
I don't notice smell unless it's left in the car all day, which I try not to do. I've carried it (both Paxes actually) around in my pocket loaded for an entire day with nary a head turned my way. I know it's not ideal at $20 from PAX Labs, but it works.
EDIT: Link:
https://www.paxvapor.com/pax-carry-case/