Finding another CFI isn't terribly difficult. As with other things, you
just have to know where to look.
The FAA online database is one. Another would be to call or email the
FSDO for your are and ask them to send you a list.
A third source is the National Association of Flight Instructors. Go to
the EAA website and find the link to NAFI.
Once you obtain some names, you can GOOGLE (or ANYWHO) for telephone
numbers.
Call them directly and explain your situation. Ask if they would be
willing to take you on. Some will probably have their own aircraft that
they would prefer to use.
Be creative and stick with it. You will not regret it.