David Chicione has schematics of the Baby Russian and it does have a coil spring for the latch cam. I would guess that a ball point pen spring would be too weak, but you should be able to find one that works at a hardware store. You could also check with David to see if e might have an original spring. Check out the link below.
38sa
The extractor is supposed to snap back into the cylinder when gun is fully opened. I would dissemble and check for grime and hardened grease in the assembly and see if it works after a thorough cleaning. If not, check for broken parts.