Erik the Viking - continental reprints

I've always wanted to acquire the lovely looking 4 volume set of Erik the Viking stories (illustrated by Don Lawrence) - but as the set usually retails for £100+ I've never been able to afford it. It did start me looking on ebay for a cheap(er) copy,  which in turn showed me that Erik's adventures have been reprinted on the continent far more than they ever have here, grrr...