i have recentley covered yyz by rush on bass and i need to cover a new song of the same level or slightly more difficult i have tried to cover teen town before and it was a disaster so please don't suggest any song by jaco pastorius they are still way beyond my level
Play some Foo Fighters.
try some Primus.
There's a nice shiny thread you may want to read here
If you can play YYZ and play it WELL then you should be able to play some Jaco with relatively little problems. Try Portrait of Tracy for something different, but it'll take you a while if you aren't good with harmonics.