It's not that I'm not interested because I love Doctor Who, but I think right now I'm struggling to keep up with the RP that I am currently doing solely in Arthur's fandom alone, so I wouldn't want to jump into a verse at present and then let you down, especially if it's something you're desperate to find. But there's always musemostwanted, that's usually a good place to put out ideas and find people for crossovers. I feel bad, but I think right now I'd probably not make it much fun. I hope you do find someone, though, so I wish you luck. =]