Joined: Aug 2010
Posts: 12,760
Likes: 2,117
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
Have you tried doing an Ebay seearch for flashlight handlebar mount?
Wide variety of generic mounts, it would be up to you to find one the right size for your light. In left hand column you can limit search to vendors in North America to get much faster shipping than you would get from overseas.
With Covid and the trade war, shipping from Asia can be quite erratic for how long it takes for things to arrive in USA. I used to assume a month but now sometimes shipping takes much longer than a month when I order things from Asia.