Hello
I believe this has been renamed to sapjco.jar file.
Please read this SAP note
529396 - SAP Java Connector Service Release 2.0.2
The JCo libraries were renamed to avoid naming conflicts.The sapjco.jar Java archive now contains the Jco classes.The sapjcorfc.dll | libsapjcorfc.so | libsapjcorfc.o | libsapjcorfc.sl libraries, which are operating system-dependent, now contain the JNI interface for the relevant RFC library
Download the SAP JCo release from this link.
http://service.sap.com/connectors
The archive is in the directory "SAP Java Connector" - "Tools & Services"
Regards
RB