What's the deal with champion?

I went to the local Advance Auto Parts for some plugs. I was thinking I could try some E3s or Champions. I asked the lady at the counter if she had any plugs for a 1970 Dart "3.7" so I get a list, go through it and so on and so forth I say how about the Champions? and She tells me we don't stock them anymore. No one does anymore, if you want them it will have to be a factory order.

I'm just wondering if anyone else has heard of this or experienced this