The 'Contact a family' website is very good as it allows you to register and remain anonymous whilst still allowing you to contact other CADASIL people.
Please consider registering with that site.
Click on the link below to go to the Contact a family site.
(the site is aimed at people with disabled children, but there is no restriction - after all CADASIL patients are 'children' of somebody.)
Contact A Family:
Contact a family website 
