Waxing a Wipperman chain

Wow, lots has “chainged” and a lot of good information. I did waxing research 2.5 years ago when Nate first mentioned it on the podcast. I’ve been waxing ever since. Fast forward, bought a new bike, bought a few extra shimano chains. Turns out I should have bought YBN chains as they take the wax better and last longer?

Anyway, thoughts on where to buy these? Im concerned about getting fakes on Amazon. Looks like Nashbar sells them and I’ve purchased from Nashbar before. Any other tips on where to get the YBN chains?