I found a solution. If anyone else is in need of some sort of protective cover for the phones, check out http://www.viziflex.com
They have covers for the 7960 keys and I've just sent them a 7905 to make a template for. The covers are $7.50 each and adhere to the phone with tape that is included. For phones used in an environment where hand are wet or dirty, or there is water that could be sprayed on them. This is a good solution. They will also make templates for any phone you send them with a 2-3 week turnaround time. Thanks! - Ed