It doesn't seem likely that you'll find a lacto strain that produces CO2 and lactic acid but not alcohol. Here's why:
C6H12O6 -> 2 C3H6O3 -> 2C2H6O + 2 CO2
glucose lactic acid ethanol carbon dioxide
My background is chemical engineering, not microbiology, but production of CO2 from sugar by fermentation requires production of ethanol. Perhaps there are other pathways to produce CO2.
If you find something, please let us know.