For making candlesthey sell them at craft stores.
If you don’t find it, candles are easy to make at home. We used to make them all of the time. Craft stores carry all of the wax, wick, color, scent, etc. We used to use paper milk cartons, sand molds, old jars (they stay in the old jars), etc. You can fill a small milk carton with ice and pour the wax in to make interesting swiss cheese candles.
Do a little research. You’ll find all of the info you need to do it at home.