You sir, are in luck!
Not long ago, edit1754 made an BG ripping tool here
. Just upload the picture\save state with the GFX you want to rip and follow the on-screen instructions.
Even though it's called a BG Ripper, you can rip foregrounds just as easily. The only difference is that you'll need to edit what each tile acts like via the Map16 editor in LM.