Hi Frank. Welcome to the site.
I have 2 Arctic SSSCAT II's, and can help you with your questions.
Those fenders on Ebay will work, however, they are not originals. They are close enough though to work for your bike, you'll just need to do some manual forming/adjusting on them so they have a radius that matches that of the tires. There are dimensions that the fender can be formed to-to achieve this as well. The rear fender bracket is not correct for an Arctic bike simply because it's too long and will make your rear fender stick up far too high. It can be cut down and re-drilled to be more correct for an Arctic bike though, there are dimensions for this as well. All in all the price is decent and you can make the parts work as they are the closest ones available to originals.
I've purchased a complete set of reproduction SSSCAT II decals from a mini bike restorer in the past, but this was almost 3 years ago and he only had 10 sets then and most were spoken for. Just the other day I did inquire about more of them and can certainly report back if/when I hear something.
Does your bike have a headlight, tail light, front brake, and reflectors? If not, you have an "ST." or "Standard" model which did not originally come with purple frame stripe or fender stripes.
post pics of your bike, or message me with any additional questions
Here is one of mine...
~Mike