The following profiles are in Lightroom 5.6 for RAW files only:
The Sigma has profiles for Canon, Nikon, Sigma and Sony bodies:
The Tamron has profiles when used on Canon and Nikon bodies:
If you're not seeing them then either your LR version is too old, your lenses are slightly different than these, or you're editing a JPG, as most profiles are for raw files only.
Here is Adobe's list of profiles and the version of LR and ACR they were added to:
Cheers all sorted THANKS.