Yes, I use those second ones Paul links to -- the copper body Vampires, and like them a lot.
Also, there shouldn't be any dissimilar metal reaction as a lot of metals require a base plating of nickel before they can be gold plated. That said, the vampires are direct gold on copper, and IMO, Nickel can sound really terrible in a low-level signal application so I avoid it at all costs and whenever possible.
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)