I found them! You must search for them under the Product Pack "UPK" instead of "Primavera". The 8.2 and 8.3 versions for EPPM are there.
This is what I found in the P6r8.2 documentation for the Oracle hosted UPK.
I'd recommend using the Oracle hosted UPK URL's that are listed in the documentation unless you need to host the UPK locally for appending to or editing.