Are you sure you want bladed spokes? If I'm reading you correctly you're building 32 spoke wheels. Bladed spokes are usually used on low spoke count "aero" wheels where extra strength is needed. I'm just not used to seeing bladed 32 spoke wheels.
Double butted spokes work well on 32 spoke wheels, usually laced 3-cross. You could buy good double butted spokes in the numbers and lengths that you need to fit your hubs and rims without wasting money on extra spokes. You will most likely need three different spoke lengths.