2005RedTJ,
How much is your arm and leg worth?
Almost all outdoor companies make a fleece pullover, and they're all pretty similar. They may vary on things like pockets, style, or colors, but they all work the same. The only problem is what other people have already mentioned, fleece doesn't really pack down very well, so if you get a comparable fleece from somewhere else, it'll probably be the same size as the one you have now.
If space is limited maybe pack a set of thermals, or an insulated jacket. If you are comparing size vs. warmth, those are probably better. I have a primaloft jacket that is much warmer than any of my fleece sweaters, but packs down into the size of a large grapefruit.