Where can I get an analog-to-digital converter (ADC) capable of DSD 128?

I am looking for an analog-to-digital converter capable of converting analog stereo signals to DSD128. What I am basically hoping for is a unit which accepts stereo analog input, converts it to DSD128 and connects to my computer with software which saves the DSD128 signal as a file an allows minor editing such as cutting the recording into individual tracks. Whenever I do a search, all I can find are digital-to-analog converters (DAC), rather than ADC.