On hex bit sockets (is that an oxymoron?), Craftsman has a set that goes from 5-10mm without 9. You might find a 14mm hex bit socket at Napa.

There's a special tool for the head bolts of the M116 and M117 engines. It's an 8mm hex bit at the end of an extension with a joggle in it to clear the cam.

Sixto
91 300SE
81 300SD