Yep, the Kampa Air is the one; we have one for our 2017 Troll 540 GT and it is terrific. Bought along with the 'van from Lowdon (Notts) with a decent discount. The only (slight) issue is feeding the bead into the rail (awkward height and stiff/difficult to feed / pull) - silicon spray in the rail reduces friction and small folding alloy step increases working height. Sorted. And, top bonus... no awkward poles - no domestic er tension!!
The stiff white plastic "drip strip", to stop rain running down side of 'van and into the awning, is A Good Thing but, it is a beggar to fit / impossible to fit on your own - ALV at Tebay say it needs 2 folk; finally, fit it and forget ie leave on permanently