Aaron Armstrong makes these in the UK for around £70
[url="http://www.wdmusic.co.uk/category/Electronics/Kent_Armstrong_Pickups,b.html"]http://www.wdmusic.co.uk/category/Electron..._Pickups,b.html[/url]
they glue to the end of the fingerboard and theres a small hole through it so you can screw a self tapper if you prefer.
GREAT pickup for Double Bass, its a single coil and the ones Aaron supplies come with a Phono connector fixed onto the back where the wiring is
if you oder one make sure you get Aaron to wire it otherwise it comes unwired and it's a frig