there really is one...
The reason you can't find any other years is because they put it under a different name and changed it a bit. Try and find some Volkl AC's (just AC - no numbers or letters after it), they are a little wider so you'll feel more balanced, but it's got pretty much the same turning radius. As for size, go with the 170 since you're still a beginner, you could do the 177, but it'll be a little harder to handle so you'd have to get used to it.
Here's a link to the skis on the volkl website so you know what you're looking for:
~WAKIN' UP THE NEIGHBORHOOD TONIGHT!~