No, the FSIQ probably isn't the best indicator of her ability if the WMI index is that much lower than the VCI/PRI indices. As far as getting #s out of those percentiles, I'd bet that Dottie would be your best bet but she'd probably only be able to do so if you have percentiles for each of the subtests within each index. If not, we can probably ballpark the #s for you (i.e. -- if you're getting a 98th percentile score for an index, you can safely assume that the number is between 130 and 132, for instance).
Can you ask the psych for the recording forms or more info than that which she gave you? I'd be frustrated too especially if I paid for that!