Hi,
Thank you for your request. We haven't tested the Cobalt 7 CCK yet, so I can't tell you exactly. Usually a JoomSEF extension development takes 4 or 5 hours. You can check the price of our support time at
www.artio.net/e-shop/support-services and if you are interested, we can check the component, estimate the exact needed time for you and implement it as a paid support service.
Otherwise we'll put the extension on our requested features list, so we'll try to implement it when we have available resources, but I can't promise you any ETA for it.