Try Numrich Gun Parts at the related link.
how to breakdown and load 38 caliber iver johnson pistol?
Value of iver johnson 8 shot 22 caliber pistol
You can get the clip for an Iver Johnson pistol 22 on various online stores like eBay and Amazon.
They do not make a nine shot pistol made by Iver Johnson. These pistols were available in the 1940s.
I believe it to be a vintage Iver Johnson pistol
How do I open an Iver johnson 32 cal pistol?
Actually, it was Johnson and Bye, the fore-runner of the Iver Johnson companies, 1871-1883.
Your Iver Johnson Target model 55 was made from 1955-1960.
Possibly Numrich Gun Parts of NY.www.e-gunparts.com
You specifically have the Iver Johnson TP-25 pistol. These were produced on US-made frames from the Iver Johnson location in Jacksonville, AR with internal parts produced by Erma-Werke in Germany. Your gun was produced in the late 1980's.
You posted this under the Iver Johnson topic and that company made a lot of revolvers in Fitchburg, which isn't far from Chicopee Falls. The only arms maker I find in Chicopee is Stevens, but I have no records of a Stevens revolver. Are you sure it is not a tip-up pistol?
Numrich (Gun Parts Copr.) has some Iver Johnson parts.