Need solution for 12-year-old girl. How to Wear/carry a Dexcom Without Using Waistpacks?

I am very impressed with what I have been reading on the Dexcom 7 Plus. My niece does not want to carry two devices, refuses to wear waist packs. She is using and will continue to use the Minimed pump. We have insurance coverage for MM sensors but we have had too many problems with cgms re pain on insertion or after EMLA wears off. She refuses to wear the MM sensors and I don't blame her. I also would hate to switch insurance to Dexcom 7 Plus cgms and then have Minimed come out with a smaller introducer needle (main gripe, others being hearing the alarm at night) with their newest pump. Our endo does not think they will have the smaller needle with the new Minimed upgrade, but she has been wrong before. Pros for Dexcom:it seems to be very accurate, you don't have to restart every three days, and you don't have to recharge it to get more days out of it. Dexcom has reduced the size of their needle more than once. Pros for MM: Integrated unit and Carelink software (awesome). Really need a way for her to carry Dex to school and activities (can just put in room she is in at home). Worried about her losing receiver. Girls her age basically pour themselves into their tight skinny jeans and tight shirts so she can't wear it. Any ideas?