Wisner's is where I found mine , there are different styles so make sure you get the right 1,   mine took the 1 with the spring plunger,
for the  44 action

Wisners is still good for the mainspring;

(You need to Login or Register to view media files and links)

Ballard also has the mainspring and lists a rimfire extractor. You might do well to give them a call to confirm it is the correct part;

(You need to Login or Register to view media files and links)

Ballard Arms does have original style extrators for the .22 rimfire High walls/ low walls. We have them both with the rim recess cut and without the rim cut. 

We also make a two piece rimfire extractor for the High/low walls but it is not listed in our parts list as it does not work with the original style extractor cut.

We also carry the knockoff spring (trigger spring).

We do list the original style two piece extractor for the Ballard.

Steven Durren