Speedometer drive gear

[twintracks]

Hi All,
I'm attempting to repair the speedometer on my '56. Cable and drive are working. It appears that the drive gear has disintegrated. I'm not having much luck finding one, or even a photo of what it looks like.
Can anyone help with parts, guidance, or photos?

20353

Thanks, Jerry

[Mark Norris]

Is it the same unit as a '56 Thunderbird ?, one on sale on Ebay;

https://www.ebay.com/itm/1955-1956-Thunderbird-angle-drive-speedometer-cable-all-transmissions-good-used/264679454038?hash=item3da01ff556:g:XEoAAOSwNvBee9q d

Looks like the driven gear is sacrificial nylon;

https://www.ecklers.com/1955-1956-ford-thunderbird-speedometer-driven-gear-19-teeth-66-27035-1.html

Here is a Mercury version for '56;

https://www.ebay.com/itm/NOS-1956-Mercury-speedometer-Drive-Gear-white-23-tooth/193384505543?hash=item2d069d60c7:g:UKUAAOSw2tFebzj j

Mac's have a whole range of white unit ratios;

https://www.macsautoparts.com/ford_mercury_late/transmission-and-driveline/manual-transmissions/speedometer-gears-and-sensors.html

..the question is which one is right for a Mkii?