make your own from 19mm Foamboard and you can get stainless hoops to screw into the top edge or have a local welder to make up a bracket fro the top of the sign.
I made something similar using 3mm aluminium which I laminated both sides with vinyl. I made a bracket for the top out of alloy angle from B&Q, which I pop rivetted onto the 3mm blank. The ‘U’ bolts at the top that you use to connect to the post can also be bought from B&Q in packs or a good local hardware shop. Sorted!
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