Have you looked at Crutchfield's site? They are a great company and I bought an adapter for my '04 T4R premium radio that lets me use Bluetooth and gives me an AUX connector for my Sirius head unit. I replaced the radio in the wife's 99 Sienna and she loves it; also Bluetooth, USB input connector.
Here's a list of available replacements. They also have a great support team to help with installation questions
door speakers at Crutchfield
I took a guess at your configuration. So start here to get exactly what you need.
speakers at Crutchfield