Defender 130 canopy purchase

This wet weather has really made me miss not having a cover over the bed of my 130. I have a Truckman but it sits above the roofline and is quite frankly the ugliest thing I have ever seen. Does anybody know who makes or where I could buy a canvas cover like what I assume is supposed to come with the vehicle? I have been looking everywhere but have no idea.
Thanks guys!

Like this?? Tonneau Covers : 130" High Capacity- Tonneau Cover Kit & Support Bars

Not quite. I managed, with limited success, to make one of those from a garden table cover as I didn't fancy spending £300 on a sheet of tarpaulin. I was looking for one of these. Far more elusive it would seem...

That is exactly what I want! Thanks Paul, now I just need to find the poles.