I cannot find (after a brief search) any chilli tea other than something that does not contain any tea itself, rather, the ingredients are:
Liquorice, cocoa shells, spearmint, fennel, anise, ginger, peppermint, nettle, chili pepper 2%, cinnamon, cardamom, cloves, black pepper.
And its description is thus:
This unique and delicious infusion is sure to make your heart sing and your feet dance. It is inspired by the Mexican tradition of combining chocolate with spices and chili....blended with a dash of chili to lift the spirits and awaken vitality while Fair Trade cacao shells provide the flavour and aroma of chocolate.
Enjoy every sip of this tea as the flavours curl playfully around your mouth and let it warm your inner being like the friendly Mexican sun...
Do you think it is something that could be made by oneself? Is anyone brave enough to try and report back?