How much would a full metal brake line replacement cost on 2005 Chevy truck?

Due to the rust and likelihood of extra time required to complete the replacement it will be difficult to obtain an accurate estimate. This procedure is usually based on time and materials used for the final tally. Best bet is contacting local auto repair facilities for more details there.. I’m thinking there may be a complete brake line replacement kit available - that might be the best way to go for the brake lines as opposed to purchasing one at a time as needed - plus ALL of the brake lines would be NEW.