Should be, however its only warranty is for stuff "after" the fix, and it has to be in good working order for the fix, according to my dealer. Which i think is wrong. But whatever. If i can find one for reasonable, I'll just replace it.Your DPF is not now covered under the eco settlement? Should be, unless you are Canadian.
In the Facebook Eco performance group there is a guy advertising to buy them. You can look for his ad, maybe he will sell you one.