glutathionylated microtitre plates?

[Carsten Hohoff]

I am looking for a source for glutathionylated microtitre plates. 

I know I could immobilize glutathion with  e.g. NUNC's COVALINK on my own,
but there must be a supplier 'out there' selling microtitre plates with 
immobilized glutathion... 
Unfortunately, NUNC itself does not sell such a modified plate

Any suggestion is welcome!

Thanks in advance

C. Hohoff
Dept. of Biochem.
Univ. of Muenster
FRG