I could eat scrambled eggs off that engine, it's THAT clean.
Just how bad is this leak? Drops? Where does it end up? Exhaust? Floor?
How long do you usually keep a car? Is this something that you cannot live with?
I hate to be snippy, but If I were you, I'd clean up that area as best as possible, maybe loosen that bolt a tiny bit, pack that seam with some gasket sealer, retighten that bolt, and hope that at least retards the leak.
I realize this is shade tree repairs with bandaids, but if it works, you put off a costly repair for a few miles, maybe more. It's your time and money, I'm just offering some advice which may be worth what you paid for it, nothing!
Good luck!