Google Product Search Feed - custom price field

[psldesigns]

For the Google Product Search Feed Price, configuration only allows for the option of price or sales/lowest price. I have 8 separate sites that use a custom product field for price as we need variable pricing set for add ons/discounts. Would like to have the option to either turn off field maps individually in the configuration so that i can assign a custom attribute OR be able to map the field to one of the custom fields.