From RockAuto:
MOTORCRAFT Part # DY1064 {#7T4Z9F472A} Heated
Upstream Front; 7T4F-9F472-AA; Excludes California & Green State Requirements
MOTORCRAFT Part # DY1111 {#8F9Z9F472A} Heated
Upstream; 8F9A-9Y460-AB; California - Green State Requirements
MOTORCRAFT Part # DY1056 {#5F9Z9G444AB} Heated
Downstream (Only 2 Remaining)