The EPA archived resource pages on unit-price trash systems lives here: https://archive.epa.gov/wastes/conserve/tools/payt/web/pdf/payasyou.pdf . Though EPA no longer updates this information, it may be a useful resource. The document includes a spreadsheet for evaluating the potential economic and environmental impacts of unit-price systems.
Monthly Green Acton Meetings are usually on the 2nd Tuesday of the month at the Acton Memorial Library. This is a great way to meet other Green Acton members and plug in to the work we are doing.