Had to order from Amazon, all the local stores sold out for the year. Just about everybody who sells bug sprays sells it spring & summer.
FWIW, refill is less than $2 and lasts me a whole weekend or longer. The little battery-fan-dispenser closes up when off to help save on evaporation. Pretty much useless when walking or still hunting but works good when you're keeping still on a stand.
9x19mm--Anything bigger is statistically insignificant.