, if so what are the prices and where can I get this done?
It would be much more expensive to convert a fuel car to PHEV or BEV than buying a new one.
But if you were talking about converting a Hybrid to PHEV?
That would require the installation of a charger and a charge port. Which although probable not terrible expensive the benefit would be limited. Most hybrids have a very small battery and would give only a few km's of range.