FIE was the IMPORTER- most of their stock was German or Italian. Long, long ago. In a galaxay far, far away..........
If you know the model, you might check at gunpartscorp.com, and maybe get lucky. However, MOST of those have a value of $50-$75 when in good condition- the cost of parts could easily exceed the value of the gun. Sorry-
What we have here is... failure- to communicate.