It might be helpful to have a consultation with a dietician. Possibly, if your doctor refers you, insurance could pay for it. It does sound like you have a puzzle there and I can understand you being wary of protein with your kidney problems.
There is quite a debate about how much protein one needs; some say we don't eat enough, others say we eat way too much. But everything in the articles I've seen that recommend upping the protein say "unless you have kidney problems," so I would use caution and talk to a professional, if your doctor can't give you answers.
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days