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chiller performance curve

I would like to be able to compare the energy savings of different manufacturers' chillers in OpenStudio. I know a number of posts have discussed where the default chiller performance curves come from, and that the coefficients in the .idf files can be edited. I am looking for the most simple way to either generate the coefficients, or hopefully find a component/measure that allows direct entry of known performance values in the OpenStudio interface.

Example Manufacturer Data:

85°F, 100% load, 0.5622 kW/ton;

75°F, 100% load, 0.4490 kw/ton;

85°F, 70% load, 0.5293 kw/ton;

75°F, 70% load, .3444 kw/ton;

Appreciate the help!