I know wizard make MM styles [url="http://www.wizardpickups.co.uk/shop.asp?category=Bass"]http://www.wizardpickups.co.uk/shop.asp?category=Bass[/url] however, im not sure what they sound like, but their other pups are dam decent.
Axesrus do one as well, [url="http://www.axesrus.com/AxeBassPup.html"]http://www.axesrus.com/AxeBassPup.html[/url] and their P bass pup is awesome, but once again, not sure of how it sounds.
Alnicos people say sound more like the original, and the ceramics are what are used in the sterling basses, and are a slightly different sound to "that" sound.