https://www.causal.app/ has free business model templates: SaaS (Foresight), eCommerce ( https://foresight.is/ ), Startup Runway, Buy/Rent, Ads Calculator
The article explicitly, repeatedly says templates are a bad idea. If you disagree, it'd be interesting to see your reasoning, rather than links to free templates.
We'd do better to find a list of business modeling books and tools.
And then take a look at integrating actual data sources; hopefully some quantitative with APIs.
Uncertainties supports mean±"error" w/ "error propagation": https://pypi.org/project/uncertainties/
Sliders etc can be done in Jupyter notebooks with e.g. ipywidgets: https://ipywidgets.readthedocs.io/en/latest/