Hi Dan, if you like your current awning, which is 'too small', have you considered having it altered to fit your new van? We did this when we last changed our van to avoid the expense of new awning and annexe etc. Our awning was increased from 925 - 950 cm, up to 975cm and you won't spot the alteration unless you know it's there.
We used Triopair for this (www.triopair.com), great service, they send a courier to collect your awning, alter it and send it back. The process takes about three weeks and cost about