Injectors and leak back test

Hi I have a 2006 facelift td4 after doing a leak back test.

It appears if I'm understanding the results correctly (Injectors 2,3,4 leaked back 25% more than number1 in the same time) that I might require some new injectors.

Is my understanding correct?

If so any opinions on where to buy them? Also new or reconned ?

Thanks. Dave