Buy a suitable pair of off the shelf ready readers (£5 to £10?), blank out the L/H lens then send them here for a new right hand lens:-

https://www.reglaze-glasses-direct.com/

Cost under £20.

You'll need your prescription for regular glasses and the Boot's optometrist who checked my eyes said at pistol foresight distance, a +1 over distance prescription would be needed. I'd taken a dummy "pistol" with me and the +1 turned out to be correct.

Put a covering note of explanation for ReGlaze in with your glasses. They've done 4 shooting lenses for me over the last few years.