[Test-Equipment] TV-7D/U tube tester part needed

[Edward Greeley]

I am desperately seeking a filament selector switch, S107, for my TV-7D. 
Actually, I only need section (wafer) E of the switch. Section E is the 
one closest to the "top" if the instrument is lying face down on the 
bench. If the instrument is face up as it would normally be in its case, 
section E would be the one on the bottom, closest to the bottom of the case.

Does anyone have a junker to cannibalize? Will pay a reasonable price, 
of course.

TIA for any help,
Ed Greeley