if you follow this link there is quite a large assortment of 17x10.5" rims, all for less than the ones you posted.
http://www.americanmuscle.com/17inchwheels.html
if you follow these ones, there are mustang mach1 wheels which are made from aluminum so they are definatly light.
http://www.slickcar.com/productdetai...ProductID=3143 http://www.slickcar.com/productdetai...ProductID=3142