David Schwabb is the guy. http://www.sgd-lutherie.com is his website. He's super knowledgeable, and does great work. If you search talkbass for info regularly like I do, you've probably seen him helping people out. He certainly helped me out via email, too.
The pickup I had done wasn't on his site at the time, so I had to get him to custom do it. I emailed with him, told him what I wanted, and away we went. The pickup I got is solid chrome, no visible poles, but otherwise a perfect match and dropped right in. It was probably 2 months from order to arrival, but it was worth it.
Looks like he's added that bridge pup to his regular inventory now, which is great: http://www.sgd-luthe...es/ND3-MHB.html , and you can listen to the different styles here: http://www.sgd-luthe...es/pickups.html - I went for the neo3, wide aperture, bridge winding, asked him for extra growly, please.
I regularly think about getting him to wind me up a proper sidewinder mudbucker, as he does make sidewinders, and I like the job he did on my bridge PU an awful lot. I also wonder about the artec (pole spacing?) or novak ($?) and finding an old 60s mudbucker (will it fit?) on ebay. And then I realize my tone is already getting very close to where I want it, and maybe I should save my money for important things, like strings. Or burritos.
Something seems to be up with talkbass right now, as this link is not working, hopefully temporary. Anyway, this is the thread that clued me in that he might be the guy to make me a bridge PU: http://www.talkbass....pup-mod-784351/
If you google around a bit, you can hear lots of demos of his work. I am a bit OCD, so I listened to lots before I made my decision. There was a great thread on talkbass where someone was A/Bing all kinds of pickups and had samples of everything. Villex and SGD really stood out to me. Unfortunately, I can't find it for you right now.
I'll fire you an email with a link from our latest show, it's just a zoom h2 out in the peanut gallery, but you can get an idea.