A couple years ago you could get SSM2164 from Digi-Key. They're no longer available now, but since recently some people here built Seppo's SSM2164 quad VCA PCB (and I'm about to build one too), I'm wondering if anybody can recommend a source. I found ebay item # 280893036724 from "sharpseller2000" looks like a pretty good deal ... but I thought I'd check here first. I'd also be willing to buy one privately within the community if anybody wants to let one go. Thanks