Heres a few I can think of:
House Of Lords-Can't Find My Way Home (Blind Faith)
Kick Axe-30 Days In The Hole (Humble Pie)
Kick Axe-With A little Help From My Friends (Beatles)
Kick Axe-The Chain (Fleetwood Mac)
Krokus-Schools Out (Alice Cooper)
Krokus-American Woman (Guess Who)
Krokus-Ballroom Blitz (Sweet)
Judas Priest-Johnny B Goode (Chuck Berry)
Heaven-Knockin' On Heavens Door (Bob Dylan)
Beau Nasty-Love Potion No.9 ( ? )
Black N Blue-Action (Sweet)
Autograph-American Band (Grand Funk)
Great White-Once Bitten Twice Shy (Ian Hunter)
Mamas Boys-Mama We're All Crazy Now (Slade)
Britney Fox-Goodbye T Jane (Slade)
Adam Bomb-All The Young Dudes (Mott The Hoople)
Contraband-Entire CD is Covers
The Cult-Born To Be Wild (Steppenwolf)
Rough Cutt-Piece Of My Heart (Janis Joplin)
Hurricane-I'm Eighteen (Alice Cooper)
Keel-Lets Spend The Night Together (Rolling Stone)
Keel-Because The Night (Bruce Springsteen)
Y&T-Your Mama Don't Dance (Loggins and Messina)
Ratt-Walkin The Dog (Aerosmith)
Phantom,Rocker & Slick-Long Cool Woman In A Black Dress (Hollies)
WASP had quite a few cover tunes also.