J.R.
If your doctor is willing to sign the release, try stork snapshots. http://www.storksnapshots.com/. They have packages specifically tailored to find out the sex...i think they are pretty reasonably priced. I hated the surprise myself and always wanted to know - i am an obsessive planner (which made me very good at my job when I worked as an Executive Admin. Asst.) and always preferred either pink or blue for layette and nursery. I always hated the yellow and green stuff, though now they've wisely added beige as a gender neutral design option in nursery and clothing as well.
I always drank an orange juice or had a sugary snack before my ultrasounds to make sure they were active :)
good luck!