You might consider the Kahr PM40.
For concealed carry the width of the handgun seems to be more critical to me than the other dimensions (within reason).
Caliber: .40 S&W
Capacity: 5+1, 6+1 (magazine with grip extension)
Operation: Trigger cocking DAO; lock breech; "Browning - type" recoil lug; passive striker block; no magazine disconnect
Barrel: 3.0", polygonal rifling; 1 - 16 right-hand twist
Length O/A: 5.47"
Height: 4.0"
Slide Width: .94"
Weight: Pistol 15.8 ounces, Magazine 1.9 ounces
I do not know whether it falls within your price range though.
I own one. It shoots reliably and accurately.
They offer the CW40 which is a little larger and less expensive.
Caliber: .40 S&W
Capacity: 6+1
Operation: Trigger cocking DAO; lock breech; "Browning - type" recoil lug; passive striker block; no magazine disconnect
Barrel: 3.6", conventional rifling; 1-16 right-hand twist
Length O/A: 6.36"
Height: 4.62"
Slide Width: .94"
Weight: Pistol 16.8 ounces
I can not find what the width of the Charter Arms Pitbull is. I'm guessing the cylinder has got to be close to 1.5" wide, since a S&W .38 5-shot cylinder is 1.36" wide.