I have a cheap fix....1" dia copper piping 18" long. Smashed 3 inches on one end in a vice, bent it at 90 degrees. Will drill a couple holes to screw/bolt the flat spot to a 2X4, 8" long, then, bolt the 2X4 to the trailer hitch. Flag pole slides into the copper piping.
Ric
OMAHOG/IHOG
Hum2@cox.net