I make my own!
Mostly for free.
take a paper mache egg carton (not plastic)
stuff 2 cotton balls into each "pocket"
I just buy candle wax, but source it however works best.
Melt in a double boiler, I use old cheap beat up saucepans from yard sales.
Fill big one 1/3~1/2 way with boiling water & lower small one (small enough to fit inside the big one) with candle stubs chopped up old candles, whatever.
When its melted, pour over the cotton balls till they're mostly saturated & set aside to cool.
You can add "starter wicks" if you like made from short pieces of twine, just dip one end in the melted wax & let it wick up.
Simply cut or tear single cup file with cotton ball & wax off & light it.
You can also use corrugated card for the "fuel holder, just cut into strips of the right height, trim to length & curl up tightly & pour wax over that.