Yes, I have D4 for my irons as well as for hybrids and woods...you just need the weight kits or you can order a club that swing weight.

If I understand correctly, you want your Ap1's to have a swing weight of D4-D5, there's quite a few parameters that are in play to achieve that swing weight. The basic things being the club head's actual exact weight, and then each shafts actual weight (and the weighting/blance of the shaft too), and lastly the grip weight. All these things that can affect swing weight.

What shaft and grip are playing currently? There's a few ways to add weight to the head to achieve the swing weight your after. The easiest being applying lead tape to the heads. Or you could add tungsten powder, or tip weights in the shaft but that'd require pulling all the heads, adding the weight and re-appoxing the head/shafts. If you already own set and want to add over all weight using lead tape is by far the easiest way to get "desired head weight".

Really hope this helped in someway. If I misread your question I apologize.