Wanted : amplifier schematics

Hello everyone,

I wonder if somebody would be able to help with the schematics/service manual (all expenses will be reimbursed, please specify) for the following power amplifiers :

Inkel MA-620; MA-910

Jeil BST JMA 600N, JMA 900

Furthermore, I'm looking for the schematic for TOA ZM-103 Impedance meter

Kind regards, JF (P.M. = J.Franken@Telenet.be)
Thank you for replying.