[VoiceOps] SIP-I

Hello, I'm working on a project which requires me to deliver SIP-I signaling to my carrier when originating outbound calls. Right now I have a OpenSER Proxy which is setup as a registrar/location server, and forks calls off-net to my carrier. Initially they asked me to provide them with a JIP (*Jurisdiction* Information Parameter) which I applied to the From header. Now they are asking that I send them all of the ISUP signaling encoded as a MIME attachment in the SIP dialogs. Being that I haven't worked with SIP-I before, I'm not exactly sure where to start, I was looking at the Cisco PGW 2200 which is capable of doing the SIP<->ISUP transaction mapping, do I have any other alternatives? Thanks