Never bought from grass city but a few retailers like great white north/sneaky pete don't ship to OZ atm, we're better off with UK/EU stuff since voltage compatibility from the wall but I buy all my stuff from hightechvaporizers, bits and bobs of glass all around.
This is my bong, exact same bowl size, if you grab an 18>14mm ground adapter it'll natively fit alot of vapes that use 14mm, some use 10mm like dynavap.
Stealthy use you'll be looking towards a battery powered unit most definitely, they have dynavaps in a portable induction heater config as well so you can go torchless on the go but still a bit bulky, someone here got a pax 3 and that's a solid vape to grab, they have a few different bowl inserts for it so you an microdose/use less herb but pax's are pricey af not on sale, something like a tinymight is in the similar price range with all the extra upgrades for a pax 3, the difference between both is the pax is conduction whilst tinymight is convection, you can work down from the tinymight convection cousins in price if that's an issue as well but I doubt, arizer solo/air 2 are both standouts in the convection range below the price of the tinymight and below are hybrid units which don't specialize in either but can hold on their own, another cheap one is planet of the vapes one and xmax starry v3 which are sub $200 in the battery unit range, also sub $200 are fury edge and at $230 fury rogue which are also standouts.
If you're lazy you would get a crafty+/mighty+ since they're just so easy out of the box like a pax 3 but pricier, bigger footprint with those two.
Imo you wouldn't be disappointed with a mighty+ but if stealth is a priority and of the ones I list above will be fine, Pax isn't the end all be all like Storz and bickel vapes but they have their place for how great/easy to use they are.
Learn about the differences between
conduction and convection before you run off and buy something, what I've listed out are the most popular battery vapes that are reliable, once you dip your toes in you'll see what other kind of vapes exist and the more you acquire your tastes will learn a certain way (terp chasing is amazing with convection since it'll deliver full flavour in the early hits)