This exchange is ran by the school PTA via a Facebook page. You will need to request to join and must answer the joining questions. Get in touch if you need uniform or have some uniform to donate. The PTA also hold pop up uniform events. The school will send a text message when these events are happening.
If you get in touch but they can’t help you, try one of the Community Exchanges as they hold generic uniform stock. You could also try our FB group.