Drehscheibe-online has a post right now featuring a number of Interzonenzüge from 1967: http://drehscheibe-online.ist-im-web.de/forum/read.php?17,3397211

I could also scan some pages out of my 1973 Reihungsplan if you like. It only shows the quantity, route and basic classes of coaches used on these trains, but you may find them interesting anyway.

Jurgen