[Blindmath] Used Braille College Text Books

[Tammy Berg]

My son will be attending a private university in the fall and we have just been notified that they will not be able to provide his texts books in Braille due to the cost of $50,000-$60,000 per text that they were quoted for having them converted to Braille. Are there any resources for used Braille math and science college text books. 
The texts that he will be using in the fall are:
Calculus, 6th Edition
James Stewart
ISBN-13978-0495011668
Publiser: Brooks Cole 
Chemistry
The Molecular View of Nature, 6th Edition
Jespersen, Brady, Hyslop
Publisher:  Wiley University Physics 
by Young & Freedman 13th edition 2012
Publishers: Addison & Wesley 
Thank You - Tammy