Help finding a part

[Jnezon]

I’ve been to the Ford parts site and can not find this small part. The antenna fin sits on a plate that tucks into the glass roof. Looking at the photos there is a rear view of the plate with the fin. To the left, there seems to be a nub that fits in sealing the base. To the right, the nub (nibb) seems to be lost. Can anyone check their Mach e - and confirm for me that it is missing. Bonus points if you can tell me the part number. Dealers parts dept. couldn't find it over the phone and through photos - asked me to bring it in…

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