Ultrasound Question

My husband and I have our A/S in a couple of weeks and we're trying to look into places other than the doctor's office to find out if Baby is a boy or girl.  Does anyone know of a place near Clermont or Davenport (we go to Heart of Florda OBGYN in Davenport) where we could find out that is cheaper than $75 (that's the price at the dr's)  It's not a bad price, but if we can find somewhere cheaper, we'd love to look into it! 

Thanks dears!!!    Amilia