Can we assume you have a Wooden Stock? This might also work with a Synthetic Stock.

You can buy a short Picatinny Rail and simply screw that to the Stock and mount your flashlight to that.

Checking on line, a Barrel Band with Rail is about $35. However, a Picatinny Rail that can be mounted to the Stock is about $10 -

https://www.amazon.com/Picatinny-Barrel-Band-Ruger-10/dp/B004O9AGSE

https://www.brownells.com/shooting-accessories/flashlights-accessories/accessory-mounts/ruger-10-22-accessory-band-prod26402.aspx

https://www.amazon.com/s?k=Picatinny+rail

Just a thought.