supportcenter feature request

Hi,
i'm searching for a complete ticket and contract software management. I need a ticket request/management and also a contract management that help me keep tracks all my customer requests of assistance and also to manage the contract that i have with them (contract by hours of work, or contract by number of incidents, costs, ...).

I love SupportCenter (it is perfect for me to manage the incidents and ticketing) but it doesn't manage the contract feature... do you plan to implement in the near future something like that? otherwise... have you got some other products that can help me?

thanks in advance
Alessandro Dalla Pozza