I see you can now get Chinese copies
https://www.ebay.co.uk/itm/Vertical-Battery-grip-DMW-BGG1-Replacement-for-Panasonic-G80-G85/263442111332?epid=25013310146&hash=item3d565f9b64:g:yI8AAOSw9qJaXxNj&clk_rvr_id=1422335233198&afsrc=1&rmvSB=true
https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.Xbattery+grip+panasonic+g80.TRS0&_nkw=battery+grip+panasonic+g80&_sacat=0
https://www.ebay.co.uk/itm/Vertical-Battery-grip-DMW-BGG1-Replacement-for-Panasonic-G80-G85/263442111332?epid=25013310146&hash=item3d565f9b64:g:yI8AAOSw9qJaXxNj&clk_rvr_id=1422335233198&afsrc=1&rmvSB=true
https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.Xbattery+grip+panasonic+g80.TRS0&_nkw=battery+grip+panasonic+g80&_sacat=0