I have read your project. I'm sure i can help you to do it.
I have made many WHMCS modules, such as:
+ Notify skype when received a ticket.
+ Integrate VPS manage tools in clientarea: VNC console, firewalLisää
200 $ USD 6 päivässä
2 freelancers are bidding on average $224 for this job
My SKills :
WHMCS modules development
whmcs theme customization