[sdiy] Tapco Sliders?

[Joe Kramer]

Hi Folks,
    While I'm on the subject, if it's not too OT, my Tapco 4400 reverb has two 50k
sliders, the cases of which are cracked.  The elements are not broken (they still work),
but the travel has a little hang-up due to the cracks.  I tried to splint them by
glueing some thin plastic to either side, but the first attempt at this more-or-less
failed.  Does anyone know where I could find some exact replacement parts for this old
thing?  They would have to be either NOS or salvaged from another Tapco to maintain the
cosmetic theme, which I'd like to do.  The less preferable option would be to replace
them all with new sliders.  Any leads would be greatly appreciated.

Regards,
Joe Kramer