Guys, does anybody know where it's possible to order aircraft materials and equipment for that? I really need that.

I know what you mean because I've also faced that issue. You know, once I decided to replace the main landing gear and both engines. Accordingly, I accidentally found this site https://www.aerospheres.com/ where it was possible to order all the necessary materials for aircraft. Have you ever thought about that? I think it's reasonable to use it.