Question about 5.56 and 9mm pak

hello
i had two questions:

doe exist 5.56x45 with copper steel washed case (like 7.62x39) ?

and these 9mm pak can be find today? (the box approximately dated 20 years ago)
if i remember the hedstamp is GEM 9mm pak
i desesperely search one or two boxes for collecting
9mm pak gem 2

There are only 5,56 with copper plated brass cases coming to my mind which doesn’t say allot: Proof by FN.

Hans

hello
yes i know the proof rounds but i ask about steel cases
copper brass proof are from:

FNB belgium
IVI canada
RG great britain