I DIY’d my own setup with the following:
71mm Tripod Mount
Silicone Water Bottle Boots (to add girth to the top of the Handy)
SMALLRIG Magic Arm 10 inch (The clamp works, but not very friendly on wooden surface)
C-Shape Desk Clamp
It’s been a year since I’ve made this set-up and it’s still holding up.
If you have a 3D printer or printing store available, I would recommend printing the official mount cap in place of the Tripod Mount and Bottle Boot. Just prepare some silicone padding to stick inside.