L.D.
Call your attorney to see if you can work out some kind of payment arrangement with his office. Not all attorneys are familiar with the appeals process and you don't want to bring in a new attorney because there is a learning curve involved everytime an attorney takes on a new case. Plus, the attorney that you have right now seems to have done a pretty good job for you so far. I would just say, check with your lawyer, explain your financial situation and ask him if there is any way to reduce the fee or work out some kind of payment plan.
I hope you can get everything worked out in your favor. Best of luck.