Genuine Canon replacement tripod base plate assembly for the BG-E6 battery grip was discontinued by Canon Japan May 2013. We no longer have a source for this part.
The tripod dial base gear assembly with brass gear is available separately here.
Genuine Canon replacement battery contact assembly for the BG-E6 battery grip.  This is the assembly that slides into the camera body at the battery compartment. Made by Canon Japan.
Genuine Canon replacement dial base plate brass gear unit for the BG-E2, BG-E2n, BG-E4, BG-E6, and the BG-E11 battery grip.  This gear unit replaces the nylon gear with a brass part. Made by Canon Japan. This part number has been discontinued with no replacement.
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