Sharing this kind of is a violation of intellectual property and is prohibited by codesðics of this forum. You have requested in a wrong place, try to google appropriate one.
Anyway all sources mentioned above are worth spending a hundred of USD and a couple of evenings even you are an intern living in a developing country.
A basis of the estimation is a correlation of purchase price and technical parameters of equipment in a developed industrial region, usually US Gulf coast.
Update:
Also you can use Aspen Capital Cost Estimator (former ICARUS) or relevant software from their competitors.