Importing a car into Thailand

Does anyone know where I can get an import duty/tax estimation before importing a car into Thailand?

A Google search found costs of between 150% and 300% of the cars value depending on age a vehicle type.

If you have a non immigrant visa and a work permit valid to work in Thailand for 12 months or more you may import one new or used vehicle.

Do a Google search as I did. There are companies there who will have such information.