Difficult to see in pic but wanted to demonstrate the PZ on each side were the same. It is due to the internal mechanism of the door that lends itself to needing the two shorter spindles.
Your existing handles are lever/pad so technically you should already have a split spindle in there unless someone before you has swapped it for a solid 1 piece type, usually because the split follower has failed in the mechanism
Is there a problem with the handles or are you just looking to spruce them up? Im just thinking you may have better luck trying to repair or repaint them than find new ones.
There must be someone making replacement handles though.
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