As soon as I discovered back order catalogs around 1977, I attempted to order JLA 102 many times, only to have an alternative comic book shipped (in those days, you listed other books you'd accept if the book you wanted was out of stock -- thank God for internet ordering!). I think I finally got it after graduating college and attending a comic book convention in Monroeville, PA (outside of Pittsburgh). So, it may not have been 20, but was at least 14 years later.