DAC's with volume controls that I know of:
Emotiva XDA-1
YBA Design WD202
Benchmark DAC1 PRE
Tact 2.2 XP (more than a DAC w/VC)
Bel Canto 3.5
Bel Canto 2.5
Peachtree Audio Nova & iNova
Peachtree Audio Decco & iDecco
Eastern Electric MiniMax DAC
Wyred 4 Sound DAC-2 and DAC-1
Burson HA-160 & 160D
Hope this helps.
Emotiva XDA-1
YBA Design WD202
Benchmark DAC1 PRE
Tact 2.2 XP (more than a DAC w/VC)
Bel Canto 3.5
Bel Canto 2.5
Peachtree Audio Nova & iNova
Peachtree Audio Decco & iDecco
Eastern Electric MiniMax DAC
Wyred 4 Sound DAC-2 and DAC-1
Burson HA-160 & 160D
Hope this helps.