If you already own a license for Stata 12, you can often find the official installers on the Stata Archive Page Version Upgrades:
: Languages like R or Python (with pandas/statsmodels) provide comparable, if not more powerful, statistical capabilities for free and are the modern standard for reproducible open science. Stata 12 REPACK Download
If you are looking for Stata 12 because of budget or system constraints, consider these safer alternatives: If you already own a license for Stata