I've created a procedural stained glass shader that you can plug an image into.
If you want to just purchase the shader I made it available on gumroad. I even grouped stuff up in the node setup so it should be easier to use.
Gumroad link: https://gum.co/CWIkC
Enjoy!
Instagram - / snow.mamba
Reddit - / blender_sam
Artstation - https://sambowman.artstation.com/
Gumroad - https://gumroad.com/sambowman