Tyre Mounted Gear / Rubbish Bags - know of any good ones ?

My Michelle Sacs bags have finely rotted and disintegrated. I did not like them much anyway, as they were "one size fits all" and they were always sliding off in one direction or another. I had to anchor them with extra ropes.

I am after a brand that makes them to suit your tyre size.

I once saw a very nice one at a camping show, but I have lost the name. It was the right size to hold a folding director chair (or two).

I would appreciate any leads on this.

Thanks,

Willie.