As Momto3pirates said, there are no DVC one bedroom units, however the hotel portion of the resort does have suites in the Tonga Suites building. The building contains Honeymoon Suite, Princess Suites, Ambassador Suites and the King Kamehameha suite. I believe Tikiman has pics of floorplans on his site. Pricing ranges from $1,141 - $3,362 and they cannot be booked on DVC points.
Like @momto3pirates and @Tink10 said, Through DVC the options at Polynesian are Studio or Bungalow(equivalent to a two bedroom villa), gotta go through Disney directly if you want a 1 bedroom or 2 bedroom or suite or any kind. Here's the layouts of each one.