Inside door handle

A landlord from Rumford, RI says:
Went online and was told your Cmech #40-150 was a perfect match so I bought it and got it today. My pin is 1/4 inch and was told the 40-150 had the same pin(spindle) size. As you can see it is not as the 40-150 takes a1/8 pin. See photo, Can you match the Cmech handle? what are my options. My order number was 513352.
Robert Lapointe

I cannot find a compatible handle in local stores.
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Paul from SWISCO responded:
I'm afraid your images did not come through. However, you can remove the spindle insert for the 40-150. Use a 3/32" Allen wrench to loosen the bolt on the side of handle and the spindle insert will fall out. The 40-150 accepts 1/8" spindle with the insert, 3/8" spindle without it. Could that work for you?
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