According to what was has been posted on the web, there were 4,137 Hemi Orange SRTs built in 2008 and 5,668 SRTs and R/Ts built in 2009, for a total of 9,805 Challengers. Here is the breakdown:

2008 SRT

Auto= 4,137 (58% of production)

2009 SRT:

Auto= 1,217
Manual= 1,507
Subtotal= 2,724

2009 R/T

Auto= 1,123
Manual= 1,821
Sub Total= 5,668