I built a portable node with this one a few weeks ago and it worked great. This is actually a CM119 chipset, not a CM108 but it still worked fine.

http://www.amazon.com/StarTech-com-Virtual-Adapter-External-ICUSBAUDIO7/dp/B002DW91F8?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00

There's probably cheaper, but at least you know this one works.

- John, N8CD

Date: Fri, 27 May 2016 16:17:22 +1200
From: Steve Wright <info@meshnetworks.co.nz>
To: app_rpt mailing list <app_rpt-users@ohnosec.org>
Subject: [App_rpt-users] usbfobs
Message-ID: <5747CA52.1090004@meshnetworks.co.nz>
Content-Type: text/plain; charset=utf-8; format=flowed

Does anyone have a reliable source of modifiable USB audio devices?

It's really really difficult to find hackable ones without buying one
here and there...

Steve

------------------------------

Message: 3
Date: Thu, 26 May 2016 23:14:50 -0700
From: Sam Skolfield <kj6qfs@gmail.com>
Cc: app_rpt mailing list <app_rpt-users@ohnosec.org>
Subject: Re: [App_rpt-users] usbfobs
Message-ID:
<CALK+jHGK-xatE9WFTU9ag=f1aJuOtcxp+dUFsPjdKhRPx7jNQw@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Please share any findings with the group, many of us are looking for them
too...