This adaptation of standard 1" (25.4mm) OD rifle scope mounts will fit a 25mm-1" OD flashlight and mount on to a 1" standard rifle scope. You need the top cover from the original scope mount to go with this part.

The base has 2.9 mm ID holes for threading using a 6-32 tap, mounting screws are 6-32 x 1", no nuts required. The top of scope to underside of mount is 20mm, if the scope turrets are higher than 20mm, the mount can be put sideways on the scope, as shown in photos.

Print in PETG (flexible), mount spreads just enough to slip over the scope and holds tight. Tested on PCP air guns only, no idea if it will fly off with recoil from powder burner.