ResourcesLoad and File.ReadOpen

Hello...
I've been searching for an entire day and I found no solution.
I am trying to get the real or native width and height from my PNG files. As soon as the PNG files are imported to unity, they width and height are converted to nearest power 2. That's perfectly fine, that makes the images weight less.
If I do Resources.Load(image), I get the Image and width&heigth on power of 2. To get the native width&height I run a script I found that could load the native PNG width and height. By loading the images with File.OpenRead and then convert it to Binary, I could get the native width&height.

Example:
1)

Code (CSharp):

1. Texture texture = Resources.Load(path, typeof(Texture)) as Texture;

if I do texture.width I would obtain for example 256 (power of 2)
2)

Code (CSharp):

1. BinaryReader binaryReader = new BinaryReader(File.OpenRead("Resources/" + path));

But then, if I run the binary code I would get the native width before compression (314, no power of 2).

Ok, that works OK! Atleast on Editor... On a build, it prints an error. Because the path on resources don't exist. The files on resources get compressed and there isn't a clear path.

How can I solve the problem?
I've tried to Resources.Load as TextAsset, then get the bytes by reading it as PNG but, the loaded width & height are the power 2 ones.

Greetings and thank you.

 

The most cheaper solution found is... duplicate the files, make them "cookie" with low quality and size, ~10Kb, to get an approach of the native image size by resources.load them