I think you can have braided lines fitted legally over here but they have to have teflon used in the end fittings to be legal. The old (non-teflon) design is prone to snapping at the ends which is why they are illegal.
Depending on where you buy from, you can get braided lines locally and they won't cost much (if anything) more than bringing them in from the states.
I pretty sure my Goodridge braided lines are legal, the shop I bought them from said they were and my insurance company didn't baulk when I told them about them being on my car.