Dont really follow you.
You already had the brake lines replaced and checked ?
Usually it will leak in the following places :
flexible brake line (gets pinched or just breaks down from the inside)
metal brake line at the flange/caliper (bent too much/nut overtightened)
brake caliper piston seals (seals will break down over time)
Usually it's the brake caliper seals that leak. The fluid then makes it's way all over the place making it difficult to determine just by looking at it.
This is not something for you to do unless you already know what to do if that makes any sense.
Brakes are one of the most important things your vehicle. Without them, you don't stop.
Take it to a shop that will fix it.
