I remember reading that the Gary Glitter thing was quashed as the guys that "found" the dodgy material on his hard drive, whilst it was in for repair, admitted to putting it there themselves, to make money out of the story
Anyway...
Suzie Quatro: Devil Gate Drive
T-Rex: 20th Century Boy / Telegram Sam
Sweet: Blockbuster (good siren effect on some versions which you can sample over the top of other bits of the mix)
Roy Wood/Wizzard: See my baby Jive
Mud: Tiger Feet / various.
Showaddywaddy: Blue moon (blue moon, blue moon, blue moon ba ba ba baba)