Doug,
I took no offense to your question or your statement. But like Nigel says laws vary from country to country. In fact laws vary from state to state in the United States. In some states, when it comes to traffic laws there is the letter of the law and the spirit of the law. Which means you can exceed the posted speed limit and keep up with traffic as long as road conditions permit.
In regard to CB linear amplifiers, I have seen numerous ones on online auctions a forum, unfortunately I do not recall where and when.
There is lots of information on the net, what we do with it is still our choice, rather it be right or wrong.