Help, I can't find a drain cover

[signal]

Pool is over 20 years old. I realize there are newer codes with regard to drain covers. I don't have the old drain covers.

I have two sumps in the deep end. As follows:

Outer Edge: 7 1/2"
Inner Edge (recessed about 1/4"): 7 1/4"
Screw Holes (Hole to Hole): 6 5/8"

I am trying to find something that fits. I got a universal "retrofit" cover, but its just not the best fit, yet it will work, but it basically just covers the entire sump and then some, and I have to use really long screws to even get down into the holes in the sump.........I would rather try to find something that is ideal.