While you wait for answers, we may have found some information which could help you.
Click here for Vertical Blinds Helphow can i fix a velux blind?
Finding spare mount brackets for Velux pleated blackout blinds?
velux drawstring cords?
Replacing cord for high Velux window?
How can I replace the fabric ( which has split ) on a velux window roller b?
how to reattach the side clips on velux blind?