Where to find the SHAR HUD textures in the base game?

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I'm not sure if they use a typical image format but I can't seem to find them in SHAR's folder in x86. What file are they in and what format do the textures use?

I want to try upscaling them and maybe implementing them into the game but I'll need to learn how to add textures into the game. If anyone has tips or know of any guides please send them over to me!
The HUD textures are located in art/frontend/scrooby2/resource/image.