Hi Terrier S
get yourself a couple of road pins (fence pins) cut off the U bend at the top on one of the pins then cut about 18" off the other for the cross bar and have it welded up
you can get 5/8" or 16 mm or get both
keep your eyes open and your will find them laying beside the road
if you know someone with a arc welder you will get the job done for the price of a beer
used my ones for years and ain't bent them yet