I found a very good site called www.looperman.com which has a lot of very professional sounding user uploaded acapellas. One singer I was very interested in is Patrica Edwards, see below for the track I made.
I intend to make an album soon featuring singers from this site, however this is just the one of the few tracks I have made so far.
Nice track, any other sites like that?
This is the only one I know, sorry. All the others are well known artists acapellas.
Nice voice, who is the singer?
A user who posted up on the acapella site. Check it out.
Dope track mate, what are using to make the beats?