[LIST] /e/OS Supported Tablets
according to gsmarena, SM-T813 and SM-T819 seems to have the same chipset.
make more search → xda
But in your case, you can have a try flashing this file, only “data connection” and calls are expected not to work.
if you are authorized to flash by the .ZIP “meta-info” (it may need some combinations) it will be cool…
Be ready to flash back to stock Samsung OS if the installation don’t works