There's a friend of mine that used my personal 4 to do this reggae/dub/pop thing - I'm not sure if he has permission to distribute the cut and it may not stylisticly be your cup o' tea, but it's one of the best recordings of my bass that I've heard.
Want I should get in touch and find out?
There are sound samples on BassTasters - one of them using the F# - but they aren't in a band setting.
Edit;
5 string sample page 6 string F# samples (I think)