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From a quick search, the Stoptech 950.44510 will not fit in 2013 es350. Centric 150.44467 Premium Brake Hose will fit but it is not stainless steel.
In older cars (pre 90's), it was a fine idea to replace the brake lines since they generated particles clogging the brake hydraulic systems. With modern materials that is no longer necessary, especially on high end vehicles like es350. But that is your call.
I don't see any reason to change the brake lines on such a late model vehicle as just a maintenance item and honestly think you're inviting more problems having an aftermarket set installed.