Good question!! It is through a website, I don’t have the resources to make them myself. There are loads of websites for it. Like vograce, zap creatives, juno…
I will say that getting them done by yourself from any manufacturer is awfully expensive (the shipping prices tend to be high), so really the best advice I can give is that if you can find a good group of people willing to order stuff with you, so that you can all split the shipping price, that will absolutely be your best bet for charm making!
I hope you manage to start making charms!! I’m having a blast with it :]