----- Edit: the Ishar 2 maps leave off some important rooms, including one with a necessary item. If you're using them, check extra carefully in areas that have tricky bits. ;-)
The page is up and running for several years :-). And additionally, there is another and better version of maps in the scan of a another magazine. ( Beware, again Czech language. )
Cool! Thanks for re-checking, must have been a temporary outage, and thanks for the nice detailed new ones!
As a further note, I found that the maps I linked to are actually missing some sections, including a critical hidden room in Ishar 2 that contains an object needed to complete the game (one of the skulls). The ones linked by Itlodeo and Lesik don't have this problem.