I just purchased a base plate for my Fujifilm X100VI from AliExpress. Here is the link if you are interested: Fujifilm X100VI Base Plate
The construction is solid, and the finish actually resembles the camera quite well. It does not obscure the battery or SD card door and it fits perfectly. I didn’t want a hand grip because they make the camera bulky.
If you just want a clean, cheap base plate for your Fujifilm X100VI that protects the bottom, this one does the job.
