I dug deeper and found more! You might want to begin with Mosler, writing in 2011. All added to Provisioning & Prosperity, a subset of FAQ.

Is It Legal for the Federal Reserve to Provide State & Local Governments Unlimited Credit Lines?
— Nathan Tankus (@NathanTankus), Notes on the Crisis Sept 6, 2020

The Uni Currency Project: Democratic Finance for Public Higher Education After COVID-19 • a novel policy mechanism for revitalizing U.S. public higher education in the age of COVID-19
— William O. Saas (@billysaas), Benjamin C. Wilson (@autogestion77), Scott Ferguson (@videotroph), Maxximilian Seijo (@maxseijo) Global Institute for Sustainable Prosperity (@GISP_tweets) Aug 2020

Stanch The Bleeding From Local and State Finances with Local Currencies • Just Do It
— Nathan Tankus (@NathanTankus), Notes on the Crisis April 6, 2020

Denison Volunteer Dollar Program
Denison May 3, 2013

The UMKC Buckaroo- A Currency Model for World Prosperity
— Warren Mosler (@WBMosler) MoslerEconomics/Modern Monetary Theory Sept 19, 2011