What we'd do as well was use a marker to draw the player numbers on a t-shirt, then we'd tear the foot part off the sock off and use the tube top as sleeves for our homemade jersey.
I went through a stretch where Paul Coffman and John Jefferson from the Packers were my favorite players. I found some socks at Woolworth (rode my bike there with my buddies, then rode home excited to tell my mom what I found) with green stripes on them and convinced my mom I needed new socks. Boy was she sore at me when she found out what I did to those socks.
It was worth it though, I was John Jefferson now!!!
-Mike