Ann, Check at Garden Junk. I know I saw it there. I forget who it was that posted it (possibly Pesky) I'm sure they'll repost it for you.

We have a local 'Forge. Imagine most placed have their own local wrought iron shops that make custom fences, burglar bars, anything you want. Local guy stocks tons of fancy curly things and just about anything imaginable for making those square bars have a style. If they dont have it they can order tons of fancy stuff or just make a template or mold and make it them selfs. Local guy sends every thing once completed to the hot dip tank. Galvanize then a prep process for primer and paint after. Might do powder coating. Havent been through their shop in years. Young upstart company here, started during the 50's, but they seem to be old fashioned quality.

The site below may give you some ideas. The following two links show brackets (from the site) that may work but the diameter of your tubing will be a factor. I think you'll need to drill at least two holes in the sign in order to mount the brackets, then paint the bolt heads to match the sign. Other option, consider drilling all the way thru the tubing and use Tamper Resistant bolts and nuts to secure the sign. http://www.hooksandlattice.com/street-brackets.html http://www.hooksandlattice.com/sign-brackets-for-poles.html Here is a link that might be useful: Brackets

Deer or bird netting would also work. It's black and virtually invisible when stretched tight. Use black zip ties, trimmed tight, to afix. You can get this relatively cheap at Home Depot or a farm or garden store.