Looking over the original post and the replies. It appears to be a simple solution. If $ is no object buy a bass and create your own bass lines, record them and your done.
[FONT=Comic Sans MS]I reject your reality and substitue my own[/FONT]
[FONT=Comic Sans MS]BYAAAAAAAAAAAH![/FONT]
[FONT=Comic Sans MS]But it goes to eleven....[/FONT]
[FONT=Comic Sans MS]BYAAAAAAAAAAAH![/FONT]
[FONT=Comic Sans MS]But it goes to eleven....[/FONT]