I didn't use any stretched textures, everything used to make that shelf is technically an 'item' texture, I took block textures and pasted them / cropped them into shape to be able to create it, thanks for the feedback though ?
Quick Edit: The texture file is actually within the download folder, I think it just consists of 4 or 5 custom textures I guess, and @Skjold I messed around with the colours and contrast because i didn't really like the original, sorry if it looks bad haha