Awning rail

I purchased my rail, to use my Fiamma caravanstore when not on my caravan, from my local dealers. They have it in stock to do repairs. You could try dealers that are local to you.

Awesome!   

Thank you. 

Type 'awning rail' into Ebay and you will find plenty!  (generally in 1.2m lengths due to postal restrictions).

For your purpose I would be inclined to visit a caravan service workshop and see if they have any scrap rail, which you would probably get for free.

What is best for this type of use is the simple plain rail that is nothing more then the slotted channel for the awning tape.  It is far less expensive than the fancy rails used by caravan manufacturers since theirs also covers panel joins.