Which article? The one that has this in it?
That's the problem. Novak wrote an article in October 2003 about this story, but it didn't mention Brewster & Associates. Maybe I'm thinking of something else.
See No. 96 in this thread. Here is the relevant excerpt:
Novak: The Wilsons for Gore
Townhall.com ^ | 10/05/03 | Robert Novak
Posted on 10/05/2003 12:58:21 AM EDT by Pokey78
WASHINGTON -- On the same day in 1999 that retired diplomat Joseph Wilson was returned $1,000 of $2,000 he contributed to Democratic presidential candidate Al Gore a month earlier because it exceeded the federal limit, his CIA-employee wife gave $1,000 to Gore using a fictitious identification for herself.
In making her April 22, 1999, contribution, Valerie E. Wilson identified herself as an "analyst" with "Brewster-Jennings & Associates." No such firm is listed anywhere, but the late Brewster Jennings was president of Socony-Vacuum oil company a half-century ago. Any CIA employee working under "non-official cover" always is listed with a real firm, but never an imaginary one.