I found a local supply of dishcloth cotton!
Hubby and I were in Upper Hutt this morning and we popped into the mall to visit Lincraft. This was my first visit to this particular store. I’m not sure how long it has been open but I saw an article online that mentioned it had opened and we had visited a Lincraft store when were in Melbourne so I knew it was similar to Spotlight.
They have balls of 100% cotton in a wide variety of colours in both 4 and 8 ply for only $5.00 a ball. So if you need a local supply, pay them a visit. The balls are 50g so depending on the pattern you should get at least one, if not two cloths from each ball.
ETA 3/3/2017: I have knitted 2 dishcloths from one ball and still have some left over so depending on the size of your cloth you will definitely get 2 cloths per ball. One of the cloths I made was Grandmas Favourite Dishcloth and the other one I made casting on 35 stitches (pattern to come)