Can you comment on whether you're looking for low, medium, or high output? Or all-around "versatility," as they say if you want to be able to "do everything." Musical style you're aiming for?
Dragon I are kind of hard to come by, and I would advise that I believe those were designed with the intention of going into 22-fret guitars (such as the Dragon series, Custom 22, and CE-22). Dragon II pickups were also in 22-fret guitars, and the DGT is 22 also.
That being said, I have "violated" my own newer Custom 24 by putting nickel-covered 57/08 pickups in it, and I LOVE it--but I do like lower-powered pickups for low-gain pop/rock stuff. These pickups are very much in the same ballpark as the Lollar Imperials, which I do have in a LP.
If you wanted to go hotter, you can also get the Vintage Bass (neck) and HFS (bridge) pickups. The VB is a vintage-style output, good for rhythm stuff; but the HFS is hot, good for lead/solo lines.
The world is your oyster when it comes to trying different pickups, but these are just my initial non-specific recommendations.