I missed riding Hollywood's BttF: The Ride by SIX WEEKS. It was already closed and being converted into Simpsons when I went to Universal for the first time in late-October, 2007. (I didn't make it to Orlando for another 2 years). As much as I would have enjoyed riding the attraction, I've seen the queue and ride films on the BttF Trilogy blu-ray set, and I have to admit that it doesn't look like I missed much. VERY cheesy, and VERY unrealistic. Back in its day, the ride was mind-blowing and revolutionary, but today it would have been laughable at best. I'm shocked that USJ's version is still open, and I figure they're due to close it here in the next year or two. I know it was sad to see it go--believe me, I was DYING to ride it when they announced its closure--but its day had long since passed.
Good luck on finding the original materials you seek…those would be awesome to have!