Machine Development in India

Hello all PreciousPlastic fellow,
I want to build these machines for my college. Can anyone help me in telling me the cost (company and other specs) of the following items in India and where to find them:
1. Temperature controller
2. SSR
3. Thermocouple
4. Band Heater
5. Gearbox with both side axle (as we are planning to run both shredder and extrusion by single motor)
6. Motor 4kw
7. Extrusion Screw (and also the design, if someone is having)

email me Harshit at infofilamentmaker@gmail.com im a machine builder from India