Spotted these in-store at North Lakes (QLD) but also available online. Men's B Collection suit jacket and trousers (selected styles/colours). Unsure of fit or quality, but probably good enough for the person who only wears a suit a few times a year.
Link for trousers (pretty sure these match the jacket but don't quote me on it):
https://www.bigw.com.au/product/b-collection-men-s-pick-and-…
Search link for other jackets/trousers:
https://www.bigw.com.au/mens-clothing-and-accessories/busine…
$30 suits again. Doesnt say material but assume polyester.
Also truth in advertising I suppose with a relevant brand name… "B Collection"…. sure is