I hunted them down on ebay,recordfairs and of course when they were released.
Me and mostly my StonesVikingsbrother JanRichards are trying to discover all cd-singlereleases, wich is a jungle in itself, and we are making an extensive list of our findings. When we have the time
Some of them are quite expensive, such as rare releases and promos.
But my advice is to start on ebay.
Vilhelm
Nordic Stones Vikings