Pella casement window bronze turn knobs

A home owner from Buena Park, CA says:
April 26, 2019
Would to find white color knobes to replace old bronze knobes. I've had no luck online finding parts. I would very much appreciate your help with a good replacement part.
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Tom from SWISCO responded:
April 29, 2019

I don't believe we have a replacement knob that will work for you in this style. You have a Pella window, and Pella handles tend to use a 3/8" spline. The only knob we have is the 39-115 but this has an 11/32" spline.

You could theoretically use our 39-227B Pella T-crank, but it won't look the same. 
Crank Hand Knob, 11/32"
Crank Hand Knob, 11/32"
39-115
$17.24
T-Crank Handle, 3/8" Spline for Pella
T-Crank Handle, 3/8" Spline for Pella
39-227B
$4.21
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