I just needed the 30" batten, so I ordered 30" x 1.25" West Marine fiberglass batten - Model # 104141. It fit perfectly in the pocket.
I'd suggest you order:
one West Marine Tapered Fiberglass Batten, 24" x 1.25", #104075
two West Marine Tapered Fiberglass Battens, 30" x 1.25", # 104141
I don't think the slight difference in length is that important; they'll just fit a little farther down in the sail's pockets.
Dave