The 17x7 Pro Race 1.2 has a listed weight of 17.3lbs. Check out
Team Dynamics AU for a dealer/availability.
To learn more about Team Dynamics, take a look at
this.
It should be noted the Pro Race 1.2 is a premium alloy, low pressure cast, heat treated, and shot peened wheel with an OEM finish. The Pro Race 1.2 can be found on race tracks around the world, most notably in Touring Car Championships. There are much more expensive wheels that are not this good.
Team Dynamics is also the sole wheel supplier for the Australian V8 Supercar series
.