Here you can Accommodation Registration Form and Foreign Temporary Resident Permit.
To get there from Bailu Road and Xiaolin Road, head East down Xiaolin Road until you arrive at Hanpu Road. Turn LEFT and continue North along Hanpu Road until your at Chongke Road (You'll see two police station signs on the right corner). Turn right down Chongke Road and the Police station will be on your left-hand side, across from a primary school. Sorry I didn't get the address!
The Kunshan Municipal Administrative Services Building is where you'll most likely need to submit your passport and documents to handle your visa issues. The building is pretty easy to find. It's located along Qianjin Road, between Changjiang Road and Huanghe Road, right up the street from the KFC.