Chris, when I searched for front springs for my '93 last year, I had two choices that both could be considered "leveling" springs for the CTD equiped trucks. One choice was a 1" set and the other was 2" to 2. 5" (both from Skyjacker). I went with the 1" springs and that works great with my camper in the back of the truck (I'm level then). W/O the camper, I'm still a bit nose down, but much closer to level than stock. I searched the archives here, and the 2" kit seems to get the nod when you tow, or don't haul real heavy loads as it sits more level with the back after the springs "settle".
Part numbers I found from Skyjacker for the springs only are:
1": D100C
2": D200C
Maybe someone can chime in here, but I think the "C" in the part # is for Cummins. Its not posted on their web page, but I'm sure the local shop I ordered from wanted to be sure I got the HD spring for the CTD. They sell a D200 (w/o the C) also for gassers I think.