I Googled but didn't find anything that would
work quickly.

Who makes an inexpensive tester that I can plug
into 208 V 3 phase L14-30 outlets to determine
phase rotation?

I'm aware of this circuit but I want something
I can buy at the Borg and leave at a worksite:
http://www.opamp-electronics.com/tut...on_2_10_03.htm

--Winston