getting an awning isnt an issue, plenty of them around een on here in the for sale section, it depends on the useage really but if i was you and starting over again, i would be looking for a 3/4 porch awing, reason being is that it would be easy to transfer that to your next caravan but still be of a decent size for sitting in and also a small saving in weight, you could even get an air awning with the detachable extention on it giving you flexability for when you had longer stays away
If you are thinking of a porch awning be careful where the door is in relation to the windows. I had a lovely porch awning with my last caravan and it fitted beautifully. However, when I changed my caravan it became useless as when I measured up it came halfway across a window, which is never a good idea. We now have a full awning, so that isn't a problem anymore.
I agree with Bluemini though, if you are living in it, get a full awning. You are immediately doubling the available living space.