I got some cotton based budget scarves from Kmart under $10 each and from cheap as chips. I also bought some nice chemo caps. My chemo went through winter so I had lots of normal wooly caps and would wear a bamboo wig cap under. Also essential to buy a sleep cap as in air conditioning your head can get really cold.
This one has some starter packs which are good.
https://www.hathouse.com.au/Some nice ones here
https://www.hatshow.com.au/index.php?route=common/allproducts&gclid=CjwKCAjwhOvPBRBxEiwAx2nhLptB2Ze9mEsYR9AazZMFQ6DorCDeXITNlSMt3hZLDyCkR-W4hnhqjRoCz3UQAvD_BwENew site I've not seen but looks good.
http://treatmetreasureme.com.au/headwear/?gclid=CjwKCAjwhOvPBRBxEiwAx2nhLsxnkw4aO0A2mYr_lm-wx7Y7_juva4S8HeH6OEELYKrp70jQaSsV-RoCJosQAvD_BwEIf you swim...this is great as UV protection and can be worn under a straw hat too. I wore mine in aquafit with clear safety glasses as my eyes became sensitive to chlorine.
http://www.nammuhats.com/special-needs/chemotherapy-hats/One chemo units also have volunteers making lovely capa ...so be sure to ask as they gorget to offer. Sone of my favourites were home made. I probably had about 20 scarves and 20 caps. I was a bit obsessed. Haha.