You can order the new shaft with adapter installed from Titleist via your home course or local golf store (if they have a Titleist acct).

I ordered my 915 D2 with that shaft through a pro shop. There is no upcharge. Took about a week to get.

If you already have a D2 and just want to replace the present shaft with the Aldila Rogue Black 60, you can order the shaft from virtually any qualified golf store or fitting facility, and have the Titleist adapter installed by them. Certainly you can order through Titleist with the adapter installed by them, but the cost will likely be up there. The shaft itself is not an inexpensive shaft. But I have seen them advertised on ebay for $150 or so. If you go that route, get one with the actual Titleist Sure-Fit Adapter installed, not one of the after-market ones.

Rogue black 60 regular is a fantastic shaft. Ordered it in my 915 d2 and liked it so much got it in 3 wood,5 wood and hybrid!