Hi
Great that you found all that back information. I bet among a few of those 13 Amigas, three were of the A2500s I have in the garage still. I cannot find Amix on their HDDs however, they all have KS/WB 2.04.
Joliet is a suburb of Chicago so that part of it makes sense.
As for the A2065 NIC.. hmm :-P sorry I needed one for my A3000T but from what I understand they are not too difficult to obtain. I'm not sure of the graphics card, I didn't see anything like that in any of the Amigas, except one of the A2500s had a Microway Flickerfixer AGA or whatever they are called cards in the video slot. My 3000T already has flickerfixing (Thank you C= !) and a Picasso II.