Looking for 1/192 Los Angeles Class Submarine

You might try some of the R/C (radio control)sub suppliers to see what they have. The kit makers, sad to say, have what they have--just becasue a thing could be made does not mean it is made. There are gaps--egregious gaps to the fans--in models of modern US subs. Which is bad, if no where as bad as the gaps in RN and Canadian naval vessels. So, what may be your best step is to see about finding some sort of plan set, and setting about scratch-building.