Al Lowe wrote back to me, and said if I looked around a bit on his website
www.allowe.com, I would find the codes I needed. I did find them, and some other great stuff. I signed up for CyberJoke 3000.
I noticed he also had some postings on "The Number of the Beast" where I promptly grabbed one for that thread.
It's nice to know we can still count on Leisure Suit Larry to not succumb to cold corporation apathy!