https://www.ebay.com/itm/VOLQUARTSEN...24eccc73d09ddd
I just ordered one for my new MK IV, just for giggles.
Active airport shooter
I'd give it a really good cleaning and lube, being sure to get under the extractor which will get caked with greasy soot quite fast if waxy lubed lead bullets have been used in it. Then test and see how it runs with fresh high velocity ammo, not std vel or sub-sonic. You may just save yourself the trouble and expense of a new extractor that really is not needed. 22 autos are notorious for grime and grit build up in the action with just moderate round count.
I hear people complain at the range often that they are having problems with 22 autos, only to find out they are trying to run the wrong ammo or the gun is dry and grittier then Death Valley. Mk 1's are a pretty dependable pistol and with just a bit of care they tend to run very well.
"Saepe errans, numquam dubitans --Frequently in error, never in doubt".
The trouble with the Internet is that it's replacing masturbation as a leisure activity. ~Patrick Murray
I second the exact edge extractor. This works very well to change it.
https://www.tandemkross.com/Gunsmith...ool_p_140.html