Yeah, the Steam Decks sold by Kogan (as opposed to 3rd parties that are also sold on Kogan) is the safest bet.

I was a little too impatient and bought a 64GB model from a 3rd party on Catch instead. I got it about 1.5 weeks later and it's been pretty great so far (roughly 8+ months). I think I waited about 2 weeks before upgrading the storage to 1TB though...