Can't find replacement floor grate

[Flow_well]

Hi, I've been trying to find a replacement for the basement floor grate I have pictured (new or old unused). It was installed when my house was constructed in late 60s. Note the "shoe" on one end. The grate is 6" in dia at the floor surface.
Thanks in advance for any help

 

[Flow_well]

After more sleuthing I found it at https://www.hardtofinditems.com/5-3-4-flat-sided-bar-strainer/.
It's a Jumbo Manufacturing #3QDS, but unfortunately they dont have any.