If I use up something in the kit ahead of the other components can I reorder that one item? I don't want to purchase an entirely new kit.
Yes, you can buy the individual components in our shop which I have linked below.
Even better, here's a link to the Single Bottle category of the store:
Here you will find:
Note that we don't have present plans to sell Thermal Initiator stand-alone replacements but if you run into a problem there, please let us know.