I would guess that there are probably better options for a vintage sounding pickup, Rio Grande, Fralin, and Duncan come to mind. I would think SGD pickups would be a bit more modern sounding. I could be wrong of course, but my experience with Neo pickups (Reed James, MK1 replacements) is no where near a vintage sounding pickup.
I'd agree that the ND3's and Sidewinders wouldn't get you a vintage jazz tone. The sidewinders would get you in Rickenbacker tone territory though. I have no idea about the SGD Alnico Vintage line though. They certainly SHOULD sound like traditional jazz pickups but I don't know of anyone that has tried them.
That's all well in good for everyone other than the people that are still waiting for their order.
A lot of people have waited a much, much longer time than promised for SGD products, including me. That's why the deal with BBG is necessary. I believe they will all eventually get their orders, but going forward, this is the best business model for SGD and for customers.