gun shops, want ads, e-gunparts.com, gun shows
try coffeys gun shop gadsden Alabama they have a lot of rare parts for handguns and rifles
Find a gunsmith and ask for help
You can't.
Try e-gunparts.com
I have one with a serial number 321864. They were first manufactured in the 1930s to around the mid 1950's for this model. Company is out of business now and parts are hard to find. J
search google images. I found one by searching for "lorcin 380 parts diagram"
It depends on which model you have. The best way to find it is too check the owner's manual.
Best bet is to find a gunsmith
gun shows, gun shops, want ads
Let a gunsmith do it.
The Mk IV 380 is a Colt Government Model .380 caliber compact semi-automatic pistol with many of the features of the time tested Government Model .45.
It is 10/380.