Triphop/hiphop instrumental suggestions...

A bunch of my friends have started their own label and production company for local artists with very different styles of Hip hop and underground rap. I have let some of them hear trip hop and they LOVED the instrumentals. I dubbed a CD of some Portishead, MA, DJ Shadow, and UNKLE instrumental tracks and now they want more... They liked the heavy bass lines and breaks of a little electronic sounds and synths, cause it sounds more hip hop influenced. They've listened the the tracks and collaborated on a few songs and now they are bugging me for more...I'm a newbie so HELP!!!!