Madisound has the FE208Z for $139 right now. It will have the FE208EZ available in 2003. I don't know about the FE208ES. Is that a separate speaker, or is that actually the FE208EZ? http://www.madisound.com/fostex.html
What is the difference between the 208Z and 208EZ?
The 208ES has a completely different cone and a double (stacked) magnet structure - but looks like it was only released to the Japanese market - and then I think it was a while ago.