In article ,
says...
I'm looking for something like this in stainless steel:

http://www.hartvilletool.com/product/11034


Two things cone to mind.

Unistrut is available in SS.

Several mfrs make pipe clamps that mount in slotted track
that's a smaller version of unistrut. Stauff is one,
Parker-Hannifin another. McMaster sells Stauff, for
example, McMaster p/n 3015T442.

Ned Simmons