You can't. Owning a ferret is illegal in California and Hawaii.
You cannot get a ferret in the state of California as they are illegal to own as pets
Yes, pet stores in California sell ferret supplies
You can own a ferret in every state except California and Hawaii
You don't. Ferrets are completely illegal in the state of California.
Ferrets are illegal in California
A domestic ferret does not have instincts to find food in the wild, they would starve to death. There are two other ferrets - European polecat ferret and black footed ferret. rephrase your question if your asking about one of them
If you go to the website of ferretsanonymous.com they have advice on how to get ferrets into California (what checkpoints to avoid) and your legal rights (what to do if you get caught) Plus they have links to other California ferret websites.
in its water bowl
You cannot buy one legally in California. You may buy one in Nevada and sneak it past Agriculture..
Here are some link to sites for pet clothing - one is how to measure your ferret, the other two are for dog clothing, but you can adapt for ferret clothing.
you can not own ferrets in California, so you can not buy them there either.