I smell a section of exhaust tubing, capped on both ends with flat discs, add fittings, breathers & drain valves to taste. (at least that's what's going on my not-so pretty truck)
I'll get a pic of mine later. It's a small aluminum can Hellmann made for me...has a pair of 3/4" hose inlets then drains back to the factory block place. Has a 1" hose out the top to vent the fumes just like stock.
This was free just my time because i had these parts in the garage. 2" exhaust pipe, i welded a nut to the bottom then used an injector tube rubber o ring on a nut to drain it. I welded 3 nuts to a plate then drilled them out to fit on the battery hold down bolt.