How can I import .copy/.t3d into the editor?

Greetings!

I’m currently working on a large sum of both static meshes and materials, and I would like a faster way of assigning them to eachother. One technique I’ve thought of is using the json like file format .COPY and .T3D to edit the files using python. The problem doesn’t lie in the theory but rather the last step, reimporting / general importing, unreal doesn’t recognise it’s own format. Here’s what I tried:

Content Browser Import: Format not in the list, when dragging it rejects the file

File > Import: Immediate crash. (Used workaround)

Migrate: Usually I would love this feature but since I can’t edit the files it’s impossible

.Uasset: These files are binary which don’t allow standard editing, nevertheless I tried and got a corrupt file error.

I’m using U.E4 version 18 on a Win10 environment.

Thanks