I had one at 29 weeks and found the teddy bear clothes at pumpkin patch fit her perfectly when she grew big enough to wear clothes.
Don't know if they still have them. They had these teddy bears that you could buy and had all the normal kids clothes in the teddys size so your child could dress it the same as themselves. The clothes were the same quality as the kids clothes.
Funnily enough the "prem clothes" they had were twice her size!
Also my mum sewed some little hospital gowns for her, they were the size of one of my hands. Gosh she was so tiny.
Pumpkin patch also do a "tiny prem" size too now.
Target, Kmart and most other stores stock from 00000, some 000000.
Hope bub continues to do well. x