Jacob, 

Any authorized Titleist retailer will be able to order the irons individually.  They will just match the specs from your serial # of one of your current irons.

Cameron 

1-888-TITLEIST

Cameron,

Is this true for previous years models?  I have the 710 AP2's and tried to order a replacement 4-Iron and was told that Titleist did not have the components and had to buy a 712 AP2 replacement???

Tom

If you get your clubs soft/hard stepped, will that show up under the serial number specs?

Thanks