Amazon is offering the core retreads
here and
here etc.
These searches also revealed an effective Amazon pre-announcement of an SpC retread available from 16 Apr 2013
Ed: fixed the URL tags
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π = 4
Consider a 5' radius blast: this affects 4 squares which have a circumference of 40' — Actually it's worse than that.
Completely Dysfunctional Handbook
Tomb of Battle: Fighter, Monk, Samurai, Blade Dancer, Knight, Swashbuckler and Ninja.