[quote name='Telebass' timestamp='1482483485' post='3200876']
For me, then, if I don't convert, I need a 5er with a nut width not exceeding 1.75". Any such thing?
[/quote]
Try this?
http://basschat.co.uk/topic/294818-yamaha-bb5000a-christmas-gift-l-600/page__fromsearch__1
Disclaimer: I don't know the seller, I just did a quick search and found this. Ask him about the nut width.
Good luck!