I think he's just asking for some places people on here got them. Sometimes for our cars it's hard to find a good product and it's nice to be able to ask the community for their experiences and maybe find things through "word of mouth" so to speak that you normally wouldn't be able to find. I do agree with using the search though, since this has been discuss previously several times and he can probably find some good info.
Zero's post was pretty much useless to you, and even though Doom's reply sounds kind of dry, he's right. You're going to have to learn to do a little searching before you ask a question answered plenty of times before.