Hello and welcome to the forums!
I'm not a moderator or have any sort of authority on this website, but I think it would have been fine to start a new thread. Happens all the time and nobody seems to mind. This thread is 5 years old, some of the laws have changed and some of the users no longer even post. So for this post I will disregard all the previous discussion and just answer directly.
Anyway, to the legal stuff. The LA county statute people talk about all the time is Chapter 13.62.
http://search.municode.com/html/16274/_DATA/TITLE13/Chapter_13_62_CARRYING_KNIVES_.html
This is the law that prohibits "carry on his person, in plain view" any knife with a blade that is 3 or more inches long. The part most people seem to forget is 13.62.030, "Exemptions to chapter applicability." It states:
The foregoing restrictions shall not be deemed to prohibit the carrying of ordinary tools or equipment for use in a lawful occupation or for the purpose of lawful recreation, or where the carrying of a knife or dagger is a recognized religious practice.
emphasis added
Outdoor activities like camping, hiking, bush-craft, whittling, and cooking fall within "lawful recreation." Without this exception they'd be handing out citations left and right to everyone trying to grill a steak, dress game or fillet fish. Hatchets, being tools, would be equally exempt unless carried with a non-tool purpose.
As a general rule, you should always have an plausible explanation ready for the possibility that you are questioned by a police officer. Never, ever say anything about "defense." Even if that really is why you have your knife, never say that. It's a long story, but cops hate that. Has to do with the psychology of being in law enforcement, and it will make them distrust you and try to find an excuse to cite you or take your blade. Hatchets are for chopping wood. The Becker is for fish/cooking.
Lastly, regarding ordering knives that are not legal to carry, that is categorically legal in any state. If the law makes it illegal to carry and says nothing else, that is all it does. It has no effect on the right to own them or conduct commerce with them. Those are separate matters. There
are laws that control the commerce of knives in existence, but they specifically are written for that purpose. Best example I can think of for Cali is switchblades. You can own, buy, sell and carry switchblades with blades under 2 inches long. If the blade is longer, then it is illegal to for anyone to sell them in the state or to carry them, but it is still legal to own them at home. You would just have to travel to another state where switchblades are legal to sell and then bring it back with you to be in full compliance with the laws.