Any stock Ford axle will look great and can be dropped. Several vendors on HAMB that are doing the dropping service. Don't use a cast axle if you go aftermarket. Make sure it is a forged axle.
At the time I didn't have a dropped original so I put a SO-Cal forged I beam axle and hairpins under my deuce pu because I could use stock 37/41 spindles and they turn lock to lock without any bending of the arms. Incidently I've sold many hundreds of cast Super Bell axles and have had no problems.