Boys 2-3 years winter clothing (Penrith CA11)

I am looking for a small amount of boys age 2-3years clothing for my grandson who will be visiting me very soon. He lives in Australia and does not have possess "winter" clothing - trousers/ jumpers/jacket/puddlesuit etc. It is only required for 3 weeks and then he returns to Australia. If anyone has anything suitable it would be greatly appreciated and I would then forward it on via freegle or charity