The original high quality chrome shower head used by Airstream in the
late '50's and 1960's is still made. VanDykes is one place that carries
it at a very decent price.
http://www.vandykes.com/product/02000659/
The matching chrome flex hose, wall mount holders (2 styles) and control
valves are available too.
See here for a complete vintage install:
http://vintageairstream.com/myrtle_tour_int.html
(bottom of page)
Best of luck,
RJ