i believe the material is available...
I am sure that it was from BBT... mmm maybe not..
They sold repro awnings..
But if this is not for sale or sold....depending on colourway I would attempt to source some material and get someone like April to run you up some sides , skirt and front..
I am envious of you having bought the awning!
If you're the sort of perso who thinks that Westfalias are nice, you might want to pop inside.