I am looking for the outer ring that several different round signs used - I need a 4' one. Most of the rings I have seen have been aluminum and have a channel inside the ring that the sign sits in. I have built a ring but it is impossible to find proper flat stock that has the channel, let alone roll it to a perfect 4'. The type of hangers shown are preferred, but any type will do. Here is an example: (this one is off a 5' Red Indian sign) Thanks, Greg