Its basically the original USS Excelsior kit modified to become the Enterprise B. Here's how the Excelsior looks like
|USS Excelsior in Star Trek III : The Search for Spock|
|USS Excelsior in Star Trek VI : The Undiscovered Country|
|Difference between the NX2000 and NCC 2000|
USS Enterprise 1701 B
For those who are building the Enterprise B kit, these images should help provide some useful reference. The images below is the same kit but redone to represent the USS Lakota in DS9.
More images after the jump