You could take a look at Karaoke Kurrents and All Country Kurrents- made by SuperCore. Good quality, good prices. The thing is to watch out for dupe discs, which they are famous for. Also, be advised that this manufacturer is probably the most counterfeited out there. Check the graphics, the mfr. code on the inner ring, etc.
The counterfeits are truly awful
I should have noted, I was buying Karaoke Kurrents for awhile too. Their % of mainstream songs was pretty high and I found the quality of them "acceptable" but not super. I may check back in there as well.
I'm really curious as to the fallout with the KJMP. I'd hate to start investing money in manu stuff that's gonna end up being back on the kjmp.