For our students and any other aspiring Milliners we have created here a list of resources for Hat-making:
https://citysewing.com/collections/millinery-head-wear-machines
http://www.customfabricflowers.com/
https://www.parkinfabrics.co.uk/
https://www.hatblocksaustralia.com.au/
Ebay.com and etsy.com are also fantastic resources for balsa utility blocks, vintage supplies and new makers.
Particularly these sellers: