ebay (via Adorama) has the Canon EF 24-105mm f/4L IS lens refurbished for $639.99 (compare to $1149 new). Check it out here on ebay.
B&H still has the killer deal on the Canon 6D with 24-104mm f/4L IS lens for $1999 (reg. $2499). Check it out here at B&H Photo.
The new Sigma 24-150mm f/4 DG OS HSM lens is now in stock for Canon DSLRs. Check it out here at B&H Photo.