I've never worn out a 1911 extractor that couldn't be re-tuned. Curiosity requests a link to the part that you'd recommend 
Something like this?
www.midwayusa.com
You might as well pack a steel file, because you might need to knock off a sharp edge or two...
And WD40 and CLP
Something like this?

Wilson Combat Bullet Proof Extractor 1911 45 ACP Series 70 Blue
Wilson Combat's Bullet Proof Extractor works like a spring to maintain proper tension on the cartridge case and has a hook that's tough enough to...

You might as well pack a steel file, because you might need to knock off a sharp edge or two...
And WD40 and CLP