The .EU domain is a storefront for Austrian high voltageshop, they are the official resellers for Thermal Expert dongles and cores. If you and nice enough they will give you a price list of the 30hz and wide temperature range as well. They do even offer a product that the i3 website doesn't offer with the TE-M1.
I recently saw a claim that i3 microbolometers use a Titianium layer on top of the Vanadium Oxide subtrate for their sensor. I might out up a thread about that soon, if I find enough information and understand the chemistry.