Here they are (in 3 parts):

NinjaWarriors (Taito,SegaMegaCD) (part 1 losselss).zip - 4shared.com - online file sharing and storage - download - kevin j (http://www.4shared.com/zip/LKR0Vg9q/NinjaWarriors__TaitoSegaMegaCD.html)
Ninjawarriors(Taito, Sega Mega CD) (lossless) middle part.zip - 4shared.com - online file sharing and storage - download - kevin j (http://www.4shared.com/zip/Kih-_A_u/Ninjawarriors_Taito_Sega_Mega_.html)
Ninjawarriors, The (1993)(Taito)(NTSC)(Jp)(Track 04 of 20)[!].zip - 4shared.com - online file sharing and storage - download - kevin j (http://www.4shared.com/zip/feOht4XP/Ninjawarriors_The__1993__Taito.html)

I hope everyone enjoys this and this is my first time uploading anything here, so it would be great to know how I did. I hope my contribution will have turned out okay, but if it didn't then let me know what went wrong.

I'm grateful to have downloaded a NinjaWarriors OST from here, but it wasn't 100% the same as this.