As far as I know, only Centennial models (fully enclosed hammer DAO) are currently available without locks. If you want a DA/SA S&W without the ILS, you'll have to either find a pre-2001 specimen or buy an ILS-equipped model and remove the feature (it's not particularly difficult and there are several online tutorials).
Smith, and Wesson, and Me. -H. Callahan
Well waddaya know, one buwwet weft! -E. Fudd
All bad precedents begin as justifiable measures. -J. Caesar