Yankee candles are sold by Yankee directly to the shops that sell them. There is no wholesaler in the chain, it's a direct to reseller situation. About all you'll find is maybe some discontinued fragrances, and there aren't many of them, they just put a different name and label on them and keep trying.
The "buyin" with Yankee to get started is around $ 2,000 and you have to be approved. Few retailers are going to risk being cut off by wholesaling some to online sellers.
Additionally, candles are heavy and expensive to ship and very breakable. I've sold candles for years and can say that even with professional packing there is almost always a broken one or two in every shipment.
Good luck, but don't hold out much hope.
BTW, they are not very good candles. They soot up pretty badly and Yankee fills them in 3 pours, with the top 20% or so in the final pour having more scent than the first two, so it will smell good when the customer opens it and sniffs, but as they burn they lose their fragrance, since their is less in the lower part of the candle.
Great marketing company, though. Have to give credit where it's due.
.