Reddit mentions of Mudder 1/4 Inch Male to 1/4 inch Male Screw 1/4 Inch Male to 3/8 Inch Male Threaded Screw Adapter for Camera/Tripod/Monopod/Ballhead/Light Stand (4 Pieces)

Here are the pictures:
https://1drv.ms/f/s!AgMiZlWv6xCmiYl7_XQVaXZG6-yZMw

I needed to fiddle around with the cable position a little bit until it doesn't drag the camera down anymore. But I like this setup very much, i think it works pretty well for a Gimbal + external MIC attached. However it can still tilt your YI 4K+ Camera a little to the left but i can live with that.

I ordered the screw off some Swiss Photo Gear Shop so I don't think this will help you much. But if you also want to use the YI Selfie Stick and a Rode Mic the Screw you want to get is "Connection Screw" 1/4" UNC to 3/8" UNC (Unified Coarse Thread).
This one should work:
https://www.amazon.com/Mudder-Threaded-Adapter-Monopod-Ballhead/dp/B01GH37HN6/ref=pd_sim_421_3?_encoding=UTF8&pd_rd_i=B01GH37HN6&pd_rd_r=TREC5HKSPCXR82H8Y7Z2&pd_rd_w=yppzj&pd_rd_wg=eCNx6&psc=1&refRID=TREC5HKSPCXR82H8Y7Z2

Please exuse the blurry pictures, I took them with my YI 4K which has a PixAero Lens (Manual Focus) installed. The Lens is great but it can be a little hard to get the photos sharp since the display is so small. I hope that this helps.

Something like this might work? https://www.amazon.de/M%C3%A4nnlich-Schraube-Schrauben-Kugelkopf-Standplatz/dp/B01GH37HN6/ref=pd_sim_421_8?_encoding=UTF8&psc=1&refRID=28QHX92SWTM4GFW57RQ7

Just use the ones with both 1/4 threads on