WTB Thermopile Head / Sensor

Bit of a long shot ... Does anyone have thermopile head they would be willing sell for a reasonable price (cheap :)?

I want to put together an LPM and this is proving to be one of the more elusive / expensive parts!

I have seen some on eBay which are located in the US, but as I am in the UK the sellers have high shipping + other charges making it too expensive...

With what they've been selling for on ebay, I'm wondering if it doesn't make sense to just buy a Laser Wave or CNI meter. Then you know that everything is new and in working order. The Coherent sensor on ebay sold for $189 today. It would have made a good meter; but it would have taken much work and lots of parts.