Hide Prices Tool for VIP Clients

I will be using WP-Client to create an area for commercial clients and I want to be able to add a button to their portal page where by they can hide the prices on my site when they are with their customers for obvious reasons.

Is there a .php wiz out there that can knock something up to put in functions.php to make this happen.

Would much appreciate it and I think it would be a v. useful plugin if someone wanted to develop it further.

Thanks,

Medesis