Where to vind this?

https://preview.redd.it/n93bmqkirjee1.jpg?width=1014&format=pjpg&auto=webp&s=46782f19099b0523fefae74d3a78c510ace624aa

i have a scope (not this one/brand) but i want to have a lever atatch. i have a screw hole for it in the scope but cant vind it anywhere? am i just blind or is this nowhere to be bought?