You will probably be hard pressed to find one instock at any of the local bike shops. There are a few different brands of helmet cams on the market for around $100 like the Oregon Scientific ATC2K that has good quality, but for a higher price around $700 for the VIOsport POV.1 the quality is amazing.
I've been using an older model of the twenty20 cam for a few years and it works great in conjunction with my Sony mini dv cam.
If you'd like to bring her in to the shop ie the"Trek Store Davenport" I'd be happy to help you in your cam decision making.

Jim G.