Chile mail order to the UK
If you type Chili farm into google you can see a vast array of UK based chili mail order companys. Not sure where you are based but there is also a stall at Borough Market called Cool Chile Co - if you're not in London they also have online sales! They have a wide range of whole chilis available including the 8/10 on the heat scale Piquin.
I read that Tesco are selling the hottest chili in the world now - but although i'm a total chili fan i'm not sure if I could handle that! Its called the Dorset Naga - google it you can read all about it :)
Hope this helps!