Please! I need Some help here!

Well I am involved in a project of Sensor Fusion for Unmanned Guided
Vechicle.
For initial protptype I need three kind of sensors

Laser Sick LADAR
Ultrasonic Range Finders
Milli-meter Wave Radar....

Now the problem is that this three sensor are not available commonly...
So we decided that we would use close approximation of the above
sensors for initial system study...

I have got some information about Ultrasonic Range
Finders/Detectors....
Particualarly I am interested in Pricing and a place to Order...

After a lot of googling I am unable to find any place selling SICK
LADAR and Milli-meter Wave RADAR....
Where do I get to buy SICK LADAR... and also a close approximation of
Mill-meter Wave Radar...
Do any of you know any place where I can see the costing and
consequently order them.....

Please Help!
Thanx a lot in advanecd