A note to the original question -- my ds-now-8 had very similar WPPSI scores at 5.5y, and qualifying+ achievement testing. When we applied to DYS the first time, they told us they needed more information since the IQ was close, but not quite.

I put together an admittedly very strong portfolio, with several videos of ds talking about his ertswhile passion -- severe weather -- and doing some math just for fun, along with a few written samples. That did the trick! Try the portfolio route with the scores you've got!

Mia