BIND Modifications

We need some modifications to BIND (dns server) version 9.5.2 found here ftp://[login to view URL] Our goal is to successfully return a configurable IP address for NXDOMAIN responses. The response must be a correctly formatted A record response with an IP address we enter in the configuration. Successful modification requires that authoritative zones still function and that NXDOMAIN responses are changed to a valid A record response with an IP address of our choosing (configured in [login to view URL]). This must run on CentOS 5. Compiled functional code and accompanying patch file is required for payment.