Yes, unfortunately they are hard to find.
Their second demo 'Temple in the Storm' is more known (all 4 songs are also on 'Become' and are sung by Andi Kravljaca), but the first demo ('Seventh Wonder') has some great stuff on it as well.
'Premonition' is a lovely instrumental start, and the proggy 'The Seventh Wonder' - with great lyrics - is a nice song with some amazing instrumental parts!
'Blinding my Eyes' is also on 'Become' but now (like the rest of the first demo) it is sung by Roman Karpovich who, by the way, does a decent job here.
'Save me' didn't make SW's first album but it would have been a worthy song on the album. The chorus is OK, but the instrumental parts, again, are great!