Starter packs of the Lazy Forger's modular cobblestones are in the webshop now - from small basing sets to tabletop/town square covering 400 x 500mm (ish) bundle packs....
Youtube video demoing the multi-fit tesselation is
here(standard 30mm DS base shown there for scale).
Just straight wide/narrow sets for now - Jack will be working on curves, crossroads, gutter/sewer panels (with interchangeable sewer covers), streetlamp holders, etc. and has already designed laser-cut carcasses to fit our existing Innsmouth Terraces - so you'll soon be able to model an entire town square....