WTB [EU]: Broken Keithley 155 Nullmeter

[Echo88]

Hi,

for a DIY-nullmeter-project im looking for a broken Keithley 155 Nullmeter or parts from it.
Specifically im interested in the working analog meter itself, the knobs and binding posts.
As these Keithleys are nice quality devices, please only offer if they are really beyond repair or you already have the parts laying around as butchering these for salvaging is of course sacrilegious for gear enthusiasts. 

Thanks.