omega 3 fatty acids - looking for a supplier

[Wolfgang Schechinger]

Hi all, 

A colleague of mine needs some omega 3 fatty acids (or sutable 
esters, for gas chromatography controls), e.g. omega 3 C20:4.

We didn't find a supplier yet (sigma, fluka, aldrich, calbiochem, 
lancaster were negative).

Any ideas where to look further? 

All input is welcome!

Wolfgang
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Wolfgang Schechinger   
Pathobiochemistry Dept.      
University of Tuebingen, Germany
email: wgschech at med.uni-tuebingen.de * wwWait: http://www.medizin.uni-tuebingen.de/~wgschech/start.htm
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