Randa thoughts on awning and canopies is very interesting, as i search for an alternative for my Isobella 300 sun shade i came across a company called Claravans who rebuild old caravans to new latest specs, t
They also make Campooze awning in various sizes with detachable side using light weight metal frames. Also on their website are the awning clamps used on the Isabella Loggia awning at the cost of only 6.95 Euros.

Their awning are big, the one for a Troll being 300x2.50cms but look very nice.
Agent are Black Country Caravans and the man with the knowledge is called Chris. have a look at their website I am sure you will find it interesting.