Can't find replacement handle.

A quick learner from Willis, MI says:
The bottom handle has a part # CD 439 on it while the top one is part # CD 440. The turn lock on CD 439 is broken.
Can't find replacement handle
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Tom from SWISCO responded:
We appreciate your inquiry.l Please take a look at our 82-078 sliding door handle set and let us know if this could be a good match for you.
A quick learner from Willis, MI says:
Part # 82-078 has 6-9/16" holes on center. The broken one that I have is 6-1/2" holes on center. Any other possible solutions? Will it be necessary that I drill new mounting holes?
Tim
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Dave Sr. from SWISCO responded:
I'm afraid we don't have a handle in this style with 6-1/2" hole spacing. Are you sure the hole spacing isn't 6-9/16"? Make sure to measure from the center of each hole. That's only 1/16" of a difference. I'm not sure why the manufacturer would make the same handle set with only a 1/16" difference between holes.
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