Fix or replace oil pan on A6 Avant Quattro

[SP-Electronics]

I have a 96 A6 Quattro wagon and it has a small crack in the oil pan, where
the drain plug screws in (about 1 to 1.5 inches long), starting from the
threaded area, and leading back along the underside. It looks like someone
over-tightened the drain plug and it split the aluminum. I am debating
whether to attempt a repair, or replace the pan. Does anyone have a good
source for a new or used pan for a decent price? I did a quick search and so
far only found them for $150-180, but was hoping to find something a little
cheaper if possible. The crack had apparently been temporarily repaired
using some JBWeld type material, but probably during the last oil change it
started leaking again. It wasn't leaking when I went to look at the car to
buy it, but after I got it home it started leaking, and I noticed that the
seller just had the oil changed on it the day I picked it up. 

Anyway, any suggestions, or ideas where to buy a cheaper pan would be
appreciated. Oh, and what's the difference between AAH and AFC engines? I
noticed that all the parts suppliers have them listed for Engine AAH or AFC,
but not sure how to tell which one I have. 

Thanks for any advice, info, assistance you can provide.