Many notebooks are equipped with this combo port, so ask for an eSATAp capable notebook.
For desktop workstation(MAC Pro), you simply need a backplate bracket (Delock).
It cost less ...
Comment: If you have the choice go eSATAp (eSATA + USB) instead of eSATA (non self powered).
eSATA on Apple IMac!
http://blog.macsales.com/6374-owc-offers-first-ever-esata-interface-for-imac
eSATA used for Final Cut & ...