That's not an RV awning rail.
That kind of fastener is used to attach Marine covers to boats. Years ago I had a Chevy Pick up with a Vinyl bed cover that used that type of fastener.
I'm afraid you will have to have something custom made to utilize your fasteners and it will probably cost much more than a new awning rail and a bag awning.
An awning rail will cost about $25.00 for your Scamp
and they're easy to install.
On my last 13' Scamp
I installed an awning rail and then bought an 8' Bag awning on ebay.
I just installed an awning rail on my 16' Scamp and a 10' bag awning.
Hope this helps,