I was really just asking are these available from a US source. It's not easy to define and search for on the web, the question is what do you call it?

As I mentioned, I know I can make one but it seemed generic enough that maybe something was already available. I think that Thorn is a house brand of SJS cycles so I don't expect to see those from US sources.

I was looking for the experiences of the forum posters, generally there is already a product available to meet needs for most problems.

I don't want to buy a new bag. I've got a decent one, I didn't pay much for it, it's big enough for my needs , it folds reasonably well for packing and mounted it should not wave around. So thats what I am hoping to use.