Sliding shutters to cover Velux in sloping roof?

[RoubaixB]

G'day, we want to make a pair of sliding shutters for the Veluxes in our snug, to improve insulation in winter. They will be covered in sound-absorbing material so as to soak up high frequencies that reverberate when you have sloping ceilings.

Can anybody think of a slider/ roller kit that could be installed top and bottom to hold the shutters flat against the ceiling?

 

[Wayners]

We have exterior blind to help with rain noise. Helps with sun as well.
Rare earth magnets might help you with fixing something over.