Question about cloud upgrades for FS9?

I understand that there are a number of cloud upgrade options for FS9. I have been using a 2D cirrus overcast set of textures by John Cillis that allows be to create a true overcast layer (so you cant see through when using 2D clouds). Is there now a comprehensive cloud upgrade that allows a true overcast layer with all cloud types while using 2D clouds?I know it can be done with 3D clouds, but I really prefer 2D ones and they are easier on my FPS. My primary interest is solid overcast for IFR approach practice.