This should be an easy one....

I need to work on my inner chest. Give me some ideas.
I also need to work on my lower chest. Let's have some ideas.

I know, cable cross-overs and declines are going to be high on the list.
Here is the wrinkle:
I have shoulder problems and declines are some of the worst things I can do for my shoulder.
The other wrinkle:
My gym has very limited equipment. The cables stay out of action. We have none of that fancy equipment, so no hammer strength of any pec decks...just bread and butter stuff.