Asterisk - Balance via IVR

Looking for someone with asterisk/cgi/php/mysql skills. We have a custom asterisk based application which does the following: when a customer dials a number the application reads the incoming number, based on that lookup caller account number and checks the balance if there is positive balance then the application forward the number to customer assigned destination phone number. We need someone to modify this application where the above still works the same, however account current balance is played to customer before call is forwarded to destination number. Thanks for the looking at this project.