Help, Swift Challenger Replacement Skylight?

Jen2thehen

Hi 

We have arrived back to our site this evening (Trewethett Farm, Cornwall) and the winds have taken our skylight out!  Can anyone offer advice on where and how we can get a replacement and if they can be fitted onsite?  Also, have no idea of the cost 
Any advice would be greatly appreciated. Van is a Swift Challenger 540 2007... 

Thank you, windy in tintagel........