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The heads I think you are referring to were the old used 10W CoherentLasersbee believe it or nor IIRC they were 36$
heads that came mounted on a Coherent PCB. They sold for ~$34.00.
MM has one of those original heads/PCB for sale right now...
http://laserpointerforums.com/f39/selling-5-10-watt-power-meters-69017.html
The 5W OPHIR heads are brand new and were sold by another
eBay member for around $55.00 each on single units.
Jerry