Try a gun shop or e-gunparts.com or Rossi
50-100 USD
50-150 or so
egunparts might have one.
go to the rossi site, they have a place to type in your number and will tellyou about it.
About $130 for one in excellent condition.
Rossi is part of Taurus. Contact Customer Service through the Taurus website.
Without more of a description; 10-150 USD
GO TO A GUNSMITH IMMEDIATELY!!! YOUR WEAPON IS NOT SAFE TO USE.
Handguns work by having some mechanism hit a sensitive primer to initiate a control deflagration and shoot a bullet. If a handgun doesn't have an external hammer that either strikes a firing pin or the primer directly, it will have an internal hammer--called a striker.
Barrel, Trigger, Trigger guard, hammer/striker, front sight, rear sight, chamber/cylinder, frame, grip.
10-100 USD or so
Blue book price depending on condition 100 pct $200, 98 pct $160, 95 pct $145, 90 pct $135