We have just had a new cover made up for our Rapido as the old one was definitly showing its age. It lasted for 30 years so can't complain really.
I thought it would be a lot of money to get onemade up for it as I needed a cover that was about 5 X 6.6 ft with a drop of 18 inches. Phoning around I found a supplier who made one to measure for £70 delivered.
It is a good heavy cover and hopefully will last a few years and keep the caravan in the great condition it is in.