I don't know why it took my so long to think of this. But
I recently came up with the idea of just using Breyer's
CarbSmart vanilla ice cream and then turning it into
whatever flavor you want using a food processor. I
made maple walnut, using some maple flavoring extract.
The surprising thing is that not only does it taste
excellent, but it also changes the consistency of the ice
cream, making it more like a soft gelato, ie taking the
air out of it. It's really good. I didn't try refreezing it, but
I would think that would work too. So, if you want to make
the flavor of your choice without going through the whole
ice cream making process, this is a fast and easy way.