Simpson Research Company Inc., manufacturing, sales and consulting services for high performance positioning systems, offering voice coil motors, actuators, fiber alighment systems, control systems, and voice coil controller boards.
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8MK105 Voice coil motor 

motor constant         >1.05 #F/sqrt Watt
force constant          >1.23 #F/Amp
velocity constant     2.7 V/M/s
coil resistance         1.37 Ohms typ
coil inductance        550 uHy
coil mass                 37 gms
stator mass              960 gms
travel                       ± 13 mm typ 
max dissipation       5 Watt
size                         2.5" w x 1.3" h x 3.15" l
This is a standard motor, if it does not fulfill your needs
we can design a custom motor. 
Email or call with your requirements.