You can, but the range is limited.
Most hardware stores will have 1 Victa 2-stroke in the line up, which will be a base model.
Some will have 2, throwing a mid ranger on the table for you.
Victa's website has a total of 45 domestic push mowers, of which only 7 are 2 stroke.
Your best bet would be to find a Victa gold dealer if you want a better range, however they won't really help for the smaller budget.
Bunnings or equivalent will provide you with a basic victa 2, steel base, simple setup and ve160 eco-torque (powertorque variant) engine, using the new made in china block, but assembled here.
I can't say how much longer they will be around, but i doubt it's long, Victa is now a really just a badge used on mostly briggs gear sold in australia, I imagine eventually Victa will drop the 2-stroke engine, and the few honda powered models, and become a factory that assembles chinese bases for briggs engines.
we recently saw the 8 millionth Victa roll out, and this mower was the first victa million milestone not to have a Victa engine on it!