Below are a few links to organisations that can help with dyscalculia and associated problems.
Dyscalculia
www.dyscalculia.org
The Dyscalculia Forum
www.dyscalculiaforum.com
Dyslexia Teacher
www.dyslexia-teacher.com/dyscalculia
Dyslexia A 2 Z
www.dyslexiaa2z.com
Swindon Dyslexia Centre
www.swindondyslexiacentre.co.uk
Dyscalculia
www.ncld.org
Learning Difficulties On Line
www.ldonline.org
Dyscalculia
www.ngfl-cymru.org.uk