Samples!

Hey guys i've been using the 4000 for awhile now and love it. but i wanted to get some sounds (i've got enough drums) where can i get stuff that can compete with the triton and the motif sound library. i want to do my entire track within the mpc 4000. (i need rhodes, strings, bass etc...) is it possible to get the motif and triton sounds. how about roland. and if so will they sound the same. where can i get them.

thanks for any help or direction u can give me.

1luv