Need help identifying this inground ladder handle

Ladder Handle Image
Can any help me identify where I can get a replace concrete insert for this time of handle?
Those mounting brackets (haven't seen one in 25 years) came on a jig with both mounts attached so that the spacing and orientation of the rail would be correct. It was something like the picture. You can see the two mounts welded together and they were embedded in the deck. Rails were installed after the concrete cured. Don't believe they are available anymore.
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