Thin front pan seal where a thick seal should be? Has the lip that secures the front pan seal become detached from the rest of the timing cover? (The channel where the seal resides is only spot welded to the cover.)
If it was me I would clean the engine compartment spotless, then go out and run it however you need to to make it leak. Then park over a large piece of cardboard and let it drip. In many cases, right above the furthest FORWARD spots are going to be where the leak is.