Coda Music Tech makes a nice Bluetooth foot switch (http://forum.arlomedia.com/index.php/topic,1490.msg5632.html#msg5632) that I wrote about a while ago. Now they're working on a new, all-metal design with some unique features. They're running a Kickstarter campaign to fund the initial production. Check it out and take advantage of the discounted pricing on some of the rewards:
https://www.kickstarter.com/projects/2013762983/stomp-bluetooth-music-pedal-for-hands-free-page-tu?ref=8tuben