SIP recursive 300 multple choices

Looking for the ability to get an iRule that can proxy a SIP invite from a server out to a remote host. The remote host returns a 300 multiple choice message whose content contains a list of routes. The F5 then tries each route to new remote hosts in series from the list (timeout 500ms) until one route returns a 200 OK within the timeout length. Then relays the 200 OK with SDP response from the remote host back the original server and allows that server to connect directly via the SDP.