Mystery linkage!

[RobDack]

Good day Forum!

I am in need of assistance. I have a trombone which I am led to believe has been “created” by Michael Rath (of Rath Trombones fame (unnecessary over explanation I know!)). It has a Conn 110H bell section and rotary valves (I assume) a Tune in Slide (assumed Rath’s own) and linkages for both triggers from an unknown source.

My problem is I’ve lost a screw for the linkage system and cannot find the correct sized replacement. It is similar to a Bach threaded plug but smaller. Would anyone have any ideas where I should look, aside from having one made bespokly.

Please see the attached images.

[DougHulme]

Have you asked Mick himself yet?

[brassmedic]

If it were me, I would just replace them with Dubro sockets.