Hi Brian...it was sculpted by a guy called fauster over at 'the clubhouse'...I've requested the details for you via PM...I'll let you know as soon as I get a reply.
The helmeted guy is indeed one great piece of work.
Not being a student of the period, though I am currently reading Stephen Pressfield's Gates of Fire, a novel about the Spartans at Thermopylae, is that an accurate helmet or is it more movie prop?