if you're 32mm, a couple options
1. OEM RSX base axle w/ swapped inners. DO NOT use aftermarket (advance auto, etc) as those have tripod bearings which make it a bit difficult to swap inners. its possible but messy
2. OEM RSX type s axles w/ swapped inners but you need the 32mm spline shaft end (part that goes into the hub) from either a B or D series axle. this can get messy, if you don't mind swapping cups, regreasing and reclamping, go for it
those two options I know for sure work, sup people said they used EP3 axles with no issues some said they have.
OP, just make sure the lengths on those B series axles are good to use. like I said this is the first time I heard of someone using b series axles with type s swapped inners.