Okay, so the main local brand in one of the chain pharmacies is Elastoplast:
https://www.elastoplast.com.au/products/crepe-bandage (note, they just don't have the 10cm/4" ones listed.)
I found some 10cm/4" wide for $NZ9.20 per roll- small pharmacy, so their overheads will affect the cost. I blanked and didn't notice if it was medium or heavy. But I have a few other places to check for a range of prices.
However, these are technically available all the time, and right next to post shops so very easy to do a quickie trip to post some flat in an envelope.
So for any Kiwi/Aussie Rey's- that's a brand that is very good with very dense crepe

It's also possibly slightly paler than the Boots.