I'd pick your favorite APA grainbill and do something like this:
.5 horizon 60 min
.5 mystery 30 min
.5 willamette 10 min
1.5 cascade flameout
1 oz cascade dry hop
My thinking with the mystery hop is in case it's something odd it won't give much flavor at 30 min, and we don't know the aa% but that small amount at 30 min should still keep you in range for IBU for an APA.