It seems that iSoaker and MaxStar have keep their old sites online still. This is sorta HydroArchives v2, expect it's only stuff that was kept online.
The Super Soaker Classics
http://aquanexus0.tripod.com/tssc/index.html
Aqua-Nexus v1.0 (6/2/99)
http://SuperSoakers.tripod.com/Backup/
AquaNexus Archives
http://aquanexus0.tripod.com/
AquaTechnology 1998
http://www.isoaker.com/Info/Aquatech/
AquaTechnology 1999
http://www.isoaker.com/Info/Aquatech1999/
AquaTechnology 2000
http://www.isoaker.com/Info/Aquatech2000/