Yeah, Walkinshaw wheels are 16inch stock.
If you are asking about Commdore wheels in general, they all share the same stud pattern so a VB commies wheels will technically fit onto a VY. (realistically probably wont cause the VY brakes are way bigger).
Also, BMW wheels are the same stud pattern as commodores.
Just to add to Sin's list of factory fittede 16" rims on VL's, HDT fitted Simmons rims in 16*7" and 16*8" as well as the 16*7" Centra's that first appeared on the VH.
Corsa