This is the oldest Kindle APK version I could find....try it and let me know how it goes.
Kindle_1.0.0.76480048.apk - 4shared.com - online file sharing and storage - download
I have the black 7" Pandigital Novel model # RR7T20WBL1 that runs Android 1.5. I tried the link above, but it would not install. Mine is not rooted, if that makes a difference. One post I read the person had installed some software from the Pandigital site and I wonder if that is what I need to install first.