here are the two fobs currently being sold on Amazon that contain the CM108 chip.

https://www.amazon.com/external-Adapter-Windows-Microphone-SD-CM-UAUD/dp/B001MSS6CS/ref=sr_1_1?ie=UTF8&qid=1467596668&sr=8-1&keywords=syba+usb+soundcard

https://www.amazon.com/StarTech-com-Stereo-Adapter-External-ICUSBAUDIOB/dp/B001EHG7DM/ref=sr_1_1?ie=UTF8&qid=1467596686&sr=8-1&keywords=startech+usb+audio

These are the only two I have found that always contain the CM108 chip this is NOT potted.
I have purchased about 40 of these and every one has contained the correct device.

Repeater builder even has a web page on making the correct connections for the Startech fob

http://www.repeater-builder.com/projects/fob/startech-fob.html

On Sun, Jul 3, 2016 at 9:36 PM, ssedgwick <ssedgwick@suddenlink.net> wrote:
In April of 2015 I purchased 5 USB sound dongles from an eBay seller with the name bargain cable usa.  All 5 that I ordered had the CM108 chip and they worked fine on Allstar.  eBay listed there website as www.bargaincableuse.com  Sometime in the last year they stopped selling on eBay.  Today I when to there website and they do have what appears to be the same (looks the same from the outside anyway) USB sound dongle listed on there website here:  http://www.bargaincableusa.com/virtual-7-1-channel-sound-card-mic-in-stereo-out-p/a-229.htm  I just ordered one and will let you know what I find when I receive it.
 
73,
Steve_WB8GRS

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