No doubt you've done the eBay thing, but FWIW I found https://tinyurl.com/this-on-eBay. It is short with a flush magnet so I don't think it will protrude into the mechanicals, but I don't know how the magnet is secured into the plug.
There are others on the same page with magnet protrusions of varying lengths. One of the shorter ones might be ok.
Could you install it and test for fouling by lifting the front end and having two people rotate the front wheels forward or backward in unison to rotate the whole gear train including the reduction gear, thereby testing for unwanted contact with the gear train?
There are others on the same page with magnet protrusions of varying lengths. One of the shorter ones might be ok.
Could you install it and test for fouling by lifting the front end and having two people rotate the front wheels forward or backward in unison to rotate the whole gear train including the reduction gear, thereby testing for unwanted contact with the gear train?
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