Obtaining Braille mathematical documents

I have just completed a physics degree at Nottingham University. As a blind person I face all the normal challenges of doing a physics degree with the additional challenge of trying to find suitable written physics materials which I can read. I had expected there may be some difficulties in finding Braille physics texts but I had not expected the number of difficulties encountered and that I would be working on my own Braille translation software by the end of my course.