AdamR,
If you want to mount an under dash radio box, see these by Dan Fink Metalworks & sold by Yogi's Inc.
(med size $28, large for $31);
http://www.yogisinc.com/results.cfm/-/Category=32/search_cd=radio%20box/results.cfm
Crutchfield Audio sells two brands that have "shaft style"...