Gold Label sells Official Merchandise (and the only one that does so at the moment). They have posted the following about a Spartacus Discount Offer - check them out.

Spartacus Offer Details

* Save 20% off your purchase from the Spartacus: Blood and Sand shop (www.goldlabel.com/spartacus), excluding shipping charges, gift wrap charges and applicable sales tax. Coupon code IAM20 must be entered at check out. Promotion starts on July 22, 2010 at 12:00 a.m. (PST) and ends on August 12, 2010 at 11:59 p.m. (PST). All orders must be from the URLs www.goldlabel.com/spartacus or www.cafepress.com/spartacus. Excludes product orders originating from the CafePress marketplace, Gift Certificates, Flip Minos, SIGG bottles, CafePress Groups purchases and bulk orders. Offer cannot be combined with any other coupons or promotions and may change, be modified or cancelled at anytime without notice. (Reported by Barbara Davies)