Since the original developer source may be difficult to find, the safest way to obtain a patched version of a Heera-style Tamil font is to look for open-source or updated equivalents, such as the family.
Ensures that typing in standard Tamil Unicode layouts correctly renders the unique design curves of TM Heera without substituting random characters.
: Be aware of the licensing terms of the font. Some fonts are free for personal use but require a license for commercial projects. Others might be free for all uses.