1- kenworth : http://www.kenworth.com/trucks/t680.aspx

or

http://www.lightpictureart.com/trucks.htm

or

http://gomotors.net/Kenworth/Kenworth-W900L.html#.UKYUfobKuZQ

2- mack : http://www.google.com/imgres?imgurl=http://www.sterlingindustriesusa.com/user/gimage/Mack-Truck_247_196.jpg&imgrefurl=http://www.sterlingindustriesusa.com/our-customer-base.htm&usg=__k5cpt-fA0oL7J5lYSsuAr-7b6I8=&h=196&w=247&sz=16&hl=en&start=110&zoom=1&tbnid=rd2HDebQCoLHgM:&tbnh=87&tbnw=110&ei=AxCmUMrEB8_DtAaqnICIAQ&prev=/search%3Fq%3Dmack%2Btrucks%26start%3D100%26um%3D1%26hl%3Den%26sa%3DN%26biw%3D1366%26bih%3D666%26noj%3D1%26ie%3DUTF-8%26tbm%3Disch&um=1&itbs=1

3- peterbilt : http://www.google.com/imgres?imgurl=http://www.spoki.lv/upload/articles/34/346401/images/_origin_Peterbilt-trucks-32.jpg&imgrefurl=http://www.spoki.lv/automoto/Peterbilt-trucks/346401/1/4&usg=__co7w2NIzTE2DRW55Tp23xY8Jz8A=&h=768&w=1024&sz=428&hl=en&start=2&zoom=1&tbnid=5UCz7Wl9rDqS6M:&tbnh=113&tbnw=150&ei=ohCmUKLVE4XAswb9moDQCQ&prev=/search%3Fq%3Dpeterbilt%2Btrucks%26um%3D1%26hl%3Den%26biw%3D1366%26bih%3D666%26noj%3D1%26ie%3DUTF-8%26tbm%3Disch&um=1&itbs=1

or

http://www.google.com/imgres?imgurl=http://www.doobybrain.com/wp-content/uploads/2007/10/real-peterbilt-optimus-prime.jpg&imgrefurl=http://www.doobybrain.com/2007/10/20/optimus-prime-peterbilt-replica-on-ebay/&usg=__R5tY-dltEEjecFd-e3Veil0xXUU=&h=450&w=600&sz=102&hl=en&start=1&zoom=1&tbnid=Gg5SGWQUL_cC9M:&tbnh=101&tbnw=135&ei=ohCmUKLVE4XAswb9moDQCQ&prev=/search%3Fq%3Dpeterbilt%2Btrucks%26um%3D1%26hl%3Den%26biw%3D1366%26bih%3D666%26noj%3D1%26ie%3DUTF-8%26tbm%3Disch&um=1&itbs=1