@ 75.00 a radio for firmware, plus the cable, plus the CPS, plus the SmartRib, it might be more cost-effective to take the radios and have your local MSS order the flashkit and have them do it.
There also might be members here that could do it for you as well..
EDIT: forgot to ask, make sure they are 1meg astro sabers before ordering... if in doubt, post your HOST/DSP.