The second comic book I ever recall receiving was Batman Family #12. It was released Jul 6, 1977, and it must have still been on the newstand since I am fairly certain I received this after DC Special #29!
This was my first exposure to the pencils of Marshall Rogers and his Man-Bat was DA BOMB!
I have always said if I had an opportunity to script a DC story I was going to somehow fit The Sunset Gang from this issue into it. I am fairly positive that they never made any real later appearances in DC beyond issue 20, and definitely not post-Crisis that I can recall! It would be my little nod to my fond memories of rereading this story over and over and over again.