I have got some from zulily.com.au , but they don’t have them available constantly – maybe once every two months.

Have you tried op shops? You may be surprised at what they have to offer, I know I am

Our gymnastics club had used clothing/outfit sales. It was great for picking up the girls gear from there. So ask at the dance school or other ones around. Also try ebay, fb, gumtree etc.

Maybe start by asking the dance academy if they have a second hand property sales area. If not, online is fabulous

Also; online groups may have items for sale too. Even check giveaway sites.

Maybe try charity shops and ask at dance shops if they have a pre loved clothing pool?