I also just remembered the old Athena EcoCalculator was setup this way, in excel with assemblies pre-defined and specific to a climate zone (based on a city selection). Athena has since shifted to the more sophisticated Impact Estimator tool and does not update this EcoCalculator, but here is a link to Athena’s site: http://www.athenasmi.org/our-software-data/ecocalculator/
A screenshot from the calculator for residential assemblies for Los Angeles (ASHRAE zone 3) although I suspect the assemblies not necessarily represent common/available assemblies and rather all assemblies:
