You can try out Emagic's Sounddiver which is a Editor/Librarian for not just the Trinity but a ton of other synths and fx modules. On the cheaper side, you can try Trinitro and (I can't remember the name). You'll find either a link directly to these in the Korg section of this site or you can find the link (in the Korg section) to the Trinity Haven site which will have links for sure.
HTH,
Fernando