Hi Sarah - There is a way to attach your Minimag to the phone clip.
2AA collar
Swivel button
I haven't used one of these collars on a Minimag, but I bought a different flashlight from someone who had attached a brass button. Although I don't use it with the phone belt clip often, it's an interesting option and some folks find it quite handy.
While you're looking at options for your Minimag, you might consider some of the LED modules the same vendor offers.
I don't have any ties to the vendor, but I've bought some of his "Drop in 2AA Flashlight Modules" and been very impressed with the output. More powerful light output than a standard Minimag at the cost of battery life (many options in the 2-hour battery life ballpark). A second LED option for your Minimag is the Opalec Newbeam module - three small LEDs give a very usable amount of light for about 8 hours with new batteries.
And, for good info on flashlights, try www.candlepowerforums.com - a very good Web community with lots of overlap with ETS.
Dave