Hi there...try Parkcity Everly Hotel Bintulu...also found this info...

Hotels/Inns/Address
Plaza Hotel, Taman Sri Dagang
Li Hua Hotel, Berjaya Commercial Centre
Regency Plaza Hotel, Kemena Commercial Centre. Tg. Batu.
Hoover Hotel, Keppel Road
ParkCity Beverly Hotel, Plot No.1, Lot 3062, Jalan Tanjung Batu, Bintulu
Royal Inn, Pedada Street
Sunlight Inn, Pedada Street
Sea View Inn, Taman Sri Dagang
New Capitol Inn, Pedada Street
National Inn, Medan Sepadu
Garden Inn, Taman Sri Dagang
City Inn, Taman Sri Dagang

Parkcity is the only best hotel in Bintulu, it's a 4* property, price range between 210 and above...
But, try Regency Plaza Hotel...it looks okay thou...