Looking for a Rain Cover for Griff

[urquattroGus]

Can anyone recommend a rain cover for my Griff.

I would like something small and neat that I can drape over the cabin when I'm parked up at the pub and or at home, to avoid putting the full roof on every time.

If i leave it for longer will obviously fit the roof, but it seems that the weather is so unpredictable, looks like wall to wall sunshine and next thing you know its another shower