SQLORA dlls are part of the ODBC driver to my knowledge.
You didnt say whether your Delph was 32 or 64 bit, but whichever it is, you would need to download the equivalent Oracle instant client software PLUS the ODBC driver.
There are also 3rd party solutions out there that claim to be better (eg
https://www.devart.com/odac/ ) but I don't have any experience with them
Hope this helps.