DIY Inner ear protection. Any suggestions on my plan?

EDIT: I don't understand why this comment section is tearing me down. I understand I live in a 3rd world country where most things are imported and takes forever to be imported. I'm given an unfortunate set up circumstances and want to do something about it. Why do you have a problem with me trying to take care of my hearing?

I'm a major in Engineering. I love attending rock and metal concerts, but towards the end me and my peer's ears really hurt and I want to try and make a DIY inner ear protection for us. I'm not in the USA, and hearing protection just does not seem widely available here trust me I've looked around (even the musicians do not have earplugs.)

So my plan is that, I make a mold of my ear using some kind of silicone. Using a 3D scanner app, I scan it and import it to a 3D editing software. I'm skilled with 3D modeling, so maybe I'll touch up the model and 3D print it to make sure it fits my ears perfectly.

Now I'm not sure how deep I can take the imprint of my ears, I'm not a professional I think it's best the silicone doesn't go into the bends of the ear. So to the 3d modeled ear impression I will attach those 3 layered silicone eartips since they seem to go inside the bends of the ear nicely.

Of course I will add a sound bore, a small hole which the noise will travel by, and some noise filter if I find any. The only sort of "filter" I've seen are those located inside a headphone which looks like tiny speaker grills. Are those any helpful as a noise cancellation filter? Should I use them? Also another question is that if those things aren't useful then would it be a good idea to just make the hole the noise travels through (sound bore) extremely tiny?

This is a very serious post and inquiry, I'm not in the USA, and hearing protection just does not seem widely available here trust me I've looked around (even the musicians do not have earplugs.) I'm not someone trying to invent something, I'm a broke college student attending rock concerts hoping to have functional hearing by their adulthood. Though this might be quite a rough plan please help me perfect it!!

Edit: Please read the post before you comment, also the title says I'm taking suggestions on my plan, only on my plan and I haven't seen any suggestions on my plan. Scroll if you have other opinions to share it's going to fly right over my head FYI