Hey, I hosted the source data in a BI tool I work on, Perspective - it provides a lot of the same functionality and I recreated a few of the views from your site as an example. Repo is here - hope you don't mind I thought you may find it useful!

https://prospectiveco.github.io/nyc_slice/

https://github.com/ProspectiveCo/nyc_slice (source) https://github.com/finos/perspective (component)