Casey from SWISCO responded:
January 31, 2024
Hello, I would recommend starting by looking over the 39-028E and 39-027E to see if these will work for you. The arms measure 9-1/2" long measured from the center of the gear as shown below. I suspect these are newer versions of your old-style assembly but the dimensions would be the determining factor. Take a look and let us know if you have any other questions. Thank you. Dimensions for 39-027e
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