Pennine or Conway did make a toilet tent for some of their older models it was angled so that it would fit nicely against the edge I think but it was made of canvas so could be pitched outside. I have seen a couple for sale on ebay but not recently.
Any toilet tent could be erected in the awning or you could try and find an awning annex but they don't come up for sale very often. We have one but did not put it up this time as we were pitched very close to the nearest tent for the first night and then just put the porta potty in the corner with a fleece blanket over it- must admit I forgot about the lights
We have got a pennine toilet tent. It fits on the left hand side of the door (door at right angles to the camper door) and is sloped so that the awning can be put up over it. Our awning annex is much shorter.
------------- Good friends are hard to find, difficult to leave and impossible to forget.
We bought an inexpensive awning bedroom to put our toilet in, which has worked well so far, although we do bring it inside overnight where it sits infront of the door.
had too many soakings getting to and from a toilet tent during bad weather, and our toilet tent is too tall for our awning.
------------- Growing old is mandatory; growing up is optional
We found an awning extension on Flebay, exact year of our camper so correct colours, paid £120 for it and use it as a toilet tent, it even has curtains that go between the awning and the extension - perfect, but I know we were really lucky!! Selina