The only reason I believe there aren't more people producing LSD is this:
The drug does not really effect the pleasure circuits of the brain. It's not addictive in the traditional sense. The majority of people who use it only ever do it a few times, only a minority of users use it regularly. Outside of certain scenes it's always very popular when first introduced, but then the popularity quickly diminishes. And it's not a drug most people can use every day.
Maybe these guys were making 1/3rds of the worlds LSD. I highly doubt it. Even if, they will inevitably be replaced as soon as someone sees the ability to create it and get decent distribution to make money from it. As long as there is demand, there will be acid. As far as the DEA.. come on, they claim 90% of all LSD is created by the same chemist that were making it in the 60's and they're all in California. Well, these guys weren't in California, and someone producing 1/3rd of all the world's LSD obviously would contridict their 90% statistic. The few LSD chemists I ever heard about were based in Oregon. And if the DEA knows where it's all coming from, why in 40 years can't they catch these guys? Because the DEA doesn't know their head from their asshole and they still refuse to even conceed that drugs exist as long as their is demand and reguardless of how many manufacturers they stop, there will always be more. Hell, a few years ago the DEA was investigating one of my friends under the notion he was a big figure in a drug ring when really the guy was selling 1/8ths and quarters of weed and other than that directed people to sources and even they weren't anything significant. The DEA is unprofessional, unrealistic and as a whole has no idea what the reality of the situation is as far as drugs go in this country. From what I know, it appears to me that the only thing they're really on top of is the cartels based in South America. Domestically I just see no evidence that they have the slightest clue as to what's going on. And if they do, they ignore it and do little to stop drug trade here.