Well, I looked a bit but didn't see any of the parts you mentioned but you could call try calling these folks:
... or maybe, try calling these guys: http://www.gun-parts.com
Also, this company probably has the largest selection of vintage gun parts around: http://www.jackfirstgun.com/index.php
Here at Jack First they have machinists who can, and do - for a price of course, make most any of the parts that a person needs.
Other than the above, all I can suggest is patience in searching auction sites... or even looking from time to time into anything that may be available on eBay.
With a bit of good luck, in time I'm sure you'll find the parts you are looking for.