Did you guys know the hex shape did not even exist until Heroscape invented it...well that and the dog, they invented that too. Would have invented the internet as well but Gore stole their idea...
I am not sure about the mat, but the terrain is from Wild Child Gaming. They also make tiles with the hex pattern, that can replace the mat. Many of the BattleTech events that Catalyst was running at Gen Con were using Wild Child terrain. The lance battles were a blast!
I've been making BT terrian for years using the Hot Wire Foam Factory tools. The best thing about foam terrian is shipping is cheap (bulky and not heavy).