Reimo Internal Window Cladding install on self build camper van

In this video I attempt to sort out my gap around the window left by the Solway panel install. I found on the Reimo website some window cladding which I think will do the job, here is a link if you think this will help you out.
Corners:
ukleisureparts...
Straight Parts: 2m lengths
ukleisureparts...
Thanks for watching as ever.