I'm looking to get AUX for the SC-816 on my 2000 S70 SE. I don't need it for iPod charging or anything like that as I don't own an iPod, just a Samsung 1GB MP3 player. I know about the name brands such as Blitzsafe and USASpec, but they're pretty expensive, which the cheapest being Blitzsafe coming in at around $90. Then there's some that I found on eBay where it's going for $27 + shipping.
My link
I also found one locally and the person is charging $60 for it. He says he took it out of his SC-816 unit. It looks like this

Can't edit...>.<
Just saw the e-mail that he sent. It's a DIY that's been reverse engineered from a Blitzsafe VOL-AUX according to him.