Robert,
I may have seen these either at VT4C or Antique electronics supply, but if I did it was a while ago. I admit this may be a figment of my imagination but they are logical places to look.
HTH,
Jim
Jim Rebman -- recovering audiophile
Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).
s.e.x. 2.1 under construction. Want list: Stereomour II
All ICs homemade (speaker and power next)