Knowing how Gene Simmons is with regards to money, my guess is that if KISS were to somehow get your letter, they would tell you that it would be fine....as long as they were paid some sort of fee.
And I don't know about Australia, but here in the United States, I think you can legally use 10-20 seconds of a track before you need to get permission. And since your friends project isn't for profit, I don't see why you would need to get KISS' permission in the first place.
If you absolutely want to get something official, I would try to find out KISS' management or their label, and send an inquiry. I tried to find both, but couldn't come up with anything.