What's the biggest tire that will fit on a...

no, seriously, I'm not going to ask that question. But a similar one.
I have a feeling I already know the answer considering I've been kind of half-heartedly web searching and flipping through countless bike mags to find out if there was one for the last several months, to no avail, but I figured I'd ask this fine community.
I found a thread on the forum that said there was a wide tire kit for the Vulcan Mean Streak, but the thread was well over a year old and the web site referenced in the thread no longer exists.
I know the stock question... 190 is pushing it, 200 is pinching it. But, does anyone know of any existence of a Vulcan (Mean Streak) wide tire kit? It seems like there's a wide tire kit out these days for every make and model but ours.
I don't necessarily have the wide tire bug, but I'm really curious to know.