Try emailing Pete Biltoft. [email protected] He can get them. He also does some really gucci looking ones in walnut ... sadly the walnut ones don't look like a good fit ...
It's your bass, of course, but I think the white ones look great. Here's an off-the-wall idea: Check out this company. Their specialty is custom pickguards, but I saw this photo on their site. It looks like it's just the top plate and not the whole cover, but that's kind of cool in itself, IMO. They can probably do it with their other materials too, of which there's quite a selection. (How about mirror chrome?!) {}
Well, since DiMarzio do the Ultra Jazz in black, you must be able to buy replacement shells for them - try DiMarzio.com
@Chef Mojotone has them. They have a couple of different sizes. Bass Jazz Bass Bridge Pickup Cover Black (5 String)
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