Coromal Princeton Skylight

We need to replace the internal frame for the skylight in our Coromal van as one of the plastic tracks has cracked, due to deterioration from the sun.

Camec don't have the part - they suggested we google the brand (which we found by removing the light cover).

The brand is Soffitte, 11 x 35; C5W/12V.

Can't find anything on the net......would think that so many vans were made, perhaps someone else has had to deal with this problem and has a solution.

All suggestions very welcome.