Use amber malt!
60, 90, and 120 minute are all just pilsner and amber malt, and they use the same hops. Here's a recipe based on a scaled up 60 minute:
Batch Size: 5.5 gallon
IBU's: 50
OG: 1.067
Grain:
12.8 lb Pilsner Malt
0.70 lb Thomas Fawcett Amber
0.70 lb Crystal 60l
Mash at 150
Hops:
26 g Amarillo 60-0 min
13 g Warrior 60-0 min
13 g Simcoe 60-0 min
14 g Amarillo 0 min
56 g Amarillo Dry Hop
Dogfish uses continuous hopping. Mix the first three additions, split into 20 equal portions, add every 3 minutes starting at 60 minutes.
Secondary:
3 lb apricot puree
Yeast:
Wyeast 1187 - ferment at 68
I haven't brewed this yet, but I think it should be pretty close.