Alpen Cereal

Does anyone know a place in the Chicago area where I can fInd Alpen cereal? The real Alpen from England, not the Canadian version that comes in the same box but isn't the same at all. I fell in love with this on a trip to London last year and have been unable to find it in the US without paying ridiculous prices online.

Maybe a shop or grocery that specializes in British foods would carry it, but I don't know of any stores like that in Chicago. Whole Foods and Treasure Island carry the Canadian version of Alpen, which I found out the hard way after buying four boxes!