Z
Grew up in southern California. Lived in Ohio for about 5 years in my twenties. Then on to northern California.
HAHyowzuzz, as in, "Ah lahk them purty HAHyowzuzz, Maw.
Howsez. Chicago area, IL.
ou-zez
'straya
Sounds Cockney to me. Which part of 'Straya you from?
My family’s mostly from the Mallee.
Plenty of flies there… you don’t want to open your mouth too wide. 
howzez–southern rural Georgia. And the first vowel is actually a southern drawl dipthong (I think that’s what that’s called) that I don’t know how to spell. Maybe hiawzez? But I would never, ever use the s sound in that word.
ETA–or what An Arky said.
Anglophone from Quebec, and I say it with a z for both the plural noun and the third person present verb.
Hauzəz.
From Missouri, but, you know, I used to listen to Depeche Mode as a teenager, so maybe I got it from them.
Howzez: Verb
Howsez: Noun
SE Michigan
How-zez, for both. SE England.
The best description I’ve ever heard of the main Aussie accent is that it’s fundamentally Cockney with your mouth almost closed and half grinning, as if you were squinting in the sun while trying not to let flies get in.