Well... from NBA.com - finals MVPs from the past 21 that played PG:
1990 -- Isiah Thomas, Detroit
Led all players in the NBA Finals with 27.6 points and 7.0 assists per game as the Pistons defeated the Portland Trail Blazers, 4-1, to win their second consecutive NBA title.
2004 -- Chauncey Billups, Detroit
Averaged 21 points and 5.2 assists to lead the Pistons to a 4-1 victory over the Los Angeles Lakers. Billups shot 51% from the field and 93% from the foul line for the series.
2007 -- Tony Parker, San Antonio Spurs
The 6-foot-2 Parker shot an astounding 42-for-74 (.568) from the field and averaged 24.5 points in the Spurs' four-game sweep of the Cleveland Cavaliers. The 25-year-old Frenchman became the first European-born NBA Finals MVP.
In that same time span:
Michael Jordan, 6 MVPs
Duncan, 3 MVPs
Shaq, 3 MVPs
Hakeem, 2 MVPs
Kobe, 2 MVPs
Pierce, 1 MVP
Wade, 1 MVP
That makes 10 wing MVPs (9 SGs, 1 SF), 8 Big Man MVPs (5 Cs, 3 PFs), and 3 PGs in 21 years. Note that in the Shaq/Kobe pairing, Shaq won the MVP every time.