I've got a customer asking me to install parking sign on his lamp post. I don't want to drill the post and the only bracket I've found are for pole banner. Does someone have a supplier and/or reference for something? Preferably in Canada, but I can order from the US.
I would use these:
works fine on both square and round posts
If they are under 18x24, you could use VHB with an ACM sign panel. Obviously wouldn't work if they are perpendicular and not flat against the pole. We did 12 like that, at request by the customer, and you can practically hang from them. Been through tornadoes and everything. We're pretty surprised at the results.