Runaway officiant

The brides are here and ready to go, but where is their officiant? Gone! The minister we had set up our wedding plans with has bailed on us because a couple in her own congregation asked her to officiate their wedding on the same day, and I guess the rules say she has to do theirs even though we asked her first. Thank goodness we still have 3 1/2 months until the wedding! Still, the choices are fairly limited. Our congregation doesn't have a minister right now because the last one resigned and he's not allowed to officiate ceremonies at our church anymore (more annoying church rules). J wanted the chaplain at her alma mater to officiate, but since she's so awesome she's very popular and had prior obligations already set up for that weekend when we asked. She made suggestions of who else might do it, and so we called this one and met with her and decided she would be a great officiant, and then she bailed. Now, while my oldest sister B was here visiting and graduating with her PhD a couple of weeks ago, I asked her to be the sole reader and co-officiant of the ceremony, but I don't think going it alone is what she had in mind when she accepted. Job for today: find a replacement officiant! Quick!