[sdiy] Seeking Marshall 1987 guitar amp potentiometers (vintage... 1975)

[Jean-Pierre Desrochers]

Hi list,

I just bought a vintage Marshall model #1987 guitar amp head
and found there is one of the inside 1meg log pots
that is damaged. (Vol I channel). This is a vintage 1975 amplifier and I can't find any source..
The pot was made by CTS and it has a 1/4" plastic shaft
with a lenght around 3/8".
The shaft travel is specific to this amp since
the pot's back has 2 notches which shorthen the overall shaft travel.
See the picture here:
http://www.arcenson.com/public/Marshall_1meg_pot.JPG 

This means I cannot use a standard CTS pot with one notch.
Is there anybody that would have some in hand ?
I'd need two of them.

Thanks.