Currently there's a German vendor on eBay who is selling an 'Info-Key Protector' for $69. After having one of ours fall off a couple times, I thought I'd give this a try. It arrived yesterday
It's a pretty well made piece. Machined out of solid aluminum and powdercoated in either black, red or green, it replaces the OEM plastic slide on mounting for the I2 and uses the same screw hole for mounting. It surrounds the Info-Key completely, but leaves the buttons easy to access. A spring loaded snap pin keeps the key securely held within the protector
http://www.ebay.com/itm/Infokey-Prot...YAAOSwoBtW2WIq
I have no affiliation with those selling these other than being a happy customer. I really like the one they sent me and I just ordered another one in a different color for our other I2 - Great way to easily tell your machines apart if you have more than one
Don