Hi, I've got a lefty 55-94 with Barts in it, and I need to replace the PUs with something more aggressive and/or vintage sounding. Been talking to Kirk at Lakland who says the Seymour Duncans are a 6-week wait, but the LH-3s are readily available. Another option would be Nordies from bestbassgear.com. I'd like to keep it humbucking in all modes, and not have to rely on the preamp to get the upper mids I need. What PUs would get me closest to a passive, more-vintage-than-Barts sound?