Yes - looks like a more 'economical' replacement.
The Aussie Staintune will have their emblem clearly on the outer face.
Stock mufflers shouldn't be hard to come by as of course many changed them for something more 'fruity'.
But at this age they may be rusted inside. The aluminium outer layer is only a dress cover.
You might have to lash out on a matching pair through a wreckers.