Cook, I face the same problem as you. I only use powerpro so during the winter it does collect water then freezes. This spring cabelas was doing a closeout on ice fishing power pro line. It came in smaller blue boxes and was only 75yards and the color was blue. Problem is the ran out quickly, so I am not sure if its a seasonal line or they quit making it. Its not listed on power pro's website. I didnt get a chance to buy any becuase I think by buddy bought all they had. He said it fishes just like normal but never got a chance to try this past winter.
I did some searching for it on the web and found a place that is still selling it.
http://www.1stopfishingshop.com/PowerProIce.html