I'm sure they have a knockoff of some sort in Straya, just under a different name. Possibly using a Strayan pun.
Like "Kangaroo Dongs" or something of the sort.
So when you do taste a Twinkie, you'll say,
"Damn, wtf! These are just Kangaroo Dongs!
I've had Kangaroo Dongs my whole life! Nothing special.
Can't believe I wasted all this time waiting when I could just be munching on Kangaroo Dongs."