I doubt anyone will make one. I've seen several requests for it. Personally, I wouldn't want Cullen in my party, unless the mod made it run smoothly into the DA2 storyline, but I would love to see more context to the romance before Amell/Surana leaves the circle (other than the Cullen Romance Mod). Or perhaps something that allows your female mage to mention that she left someone back at the circle tower, and show some reluctance when falling for Alistair, Leliana, or Zevran (or Roland). It just feels to me like all the romance options are too abrupt, especially if your warden cared for someone who was left behind, or died (Cullen, Jowan, Nelaros, Nesiara, Tamlen, Gorim, Dairren, Roland, etc.). And on the same subject, a stand-alone Jowan companion would be amazing, and wouldn't clash too much with the original story, since from what I understand, Jowan was supposed to be part of the group in the first place, but Bioware decided to not include him. Jowan and Roland are really the only origin NPCs that I feel work with the storyline if they travel with you, but that's only my opinion.