Got a picture of MX/red stem and spring from my friend.
After examining the pics, I decided to set forth Black on Brown adventure.
Base keyboard; G80-1800HPU ; double injection key caps, brown MXs
donor keyboard; any of those which have black/MX. Mine were from Wyse terminal boards.
attachements are
1800 front image, bottom label, brown module on the PCB, stem and spring ( brown and red )
To be continued due to limitation of attachments...