Insert certificate in http header from SSL server profile

Hello all, I am new in the BIG-IP business and I have a question about inserting X509 certificate in to http header on server side. The scenario is, the https client request is terminating on the BIG-IP. There is no authentication required. The session will be forwarded to an external service with a specific certificate in the http header. The certificate information's are saved in the SSL server profile. I am searching for an iRule to insert the certificate from the SSL server profile in to the http header. Any suggestion, example and help are welcome.