^That, plus use some PCB mount TO-3 sockets. Mouser has some Keystone ones. Or use solder tab sockets, and wire to the PCB. These look pretty decent.
http://www.mcmelectr...product/21-1645
There are also Tyco (IIRC) sockets that look really nice, but are $$$
EDIT: Also, there are two lead diameters used on TO-3s (0.041 and 0.060"), and many sockets only accept the smaller diameter. Don't ask how I know