I was looking for non Infinity related stuff (airplane diorama stuff) and find out that during the 60s-70s, some soviet airbases' tarmac was made with concrete plates. And some of them were made of hexa shaped plates. If I get it right, the concrete plates allowed quick airfield building and the hex shaped had a lower impact if bombed. Plates also permit to repair runway faster than pouring concrete or asphalt. Anyway, my point is: it's pretty common to find large hex surface for cheap in modeller stuff at different scales as it is used for diorama. For small surface, it could be easy to sculpt hex with rolls or similar techniques but if someone want to go bigger I think it could be a pretty decent option for little money (I found a 235mm x 165 mm base for 2€).