Here is another link for a 13" break conversion. It utilizes the factory calipers. I have something similar to this on my car, it looks a though they are 07 Dodge Viper rotors. I am running re-drilled Dodge Viper rotors and factory calipers very similar to what he is selling.
his add:Key benefits of this kit are:
• Use of stock calipers, brake hoses and parking brake cables keeps cost to a minimum.
• Stock brake bias and parking brake function retained.
• 25% increase in brake rotor diameter for improved visual impact behind 17+†wheels.
• 29% increase in brake system mechanical advantage due to caliper being further from wheel center.
• 20% increase in rotor/pad surface area to reduce potential for brake fade.
• Available in Drilled/Slotted w/Zinc coating to minimize additional weight and improve appearance.
• No interference issues between the rotor/caliper and the front suspension a-arms.
• Bolt on installation without requiring any modification to the calipers, a-arms or uprights
The downside of this kit is:
• Wheel requirement – this kit requires 17+ wheels
The Kit consists of the following parts
• 4 - 13†rotors drilled to the 5x100mm pattern
• 4 – steel caliper brackets to relocate the stock brake calipers
• 8 - grade 10.9 M12 bolts
http://www.ebay.com/itm/13-Drilled-Slotted-Brake-Rotor-Upgrade-1988-88-Fiero-GT-or-replica-kit-car/190651793039?ssPageName=WDVW&rd=1&ih=009&category=33564&cmd=ViewItem#ht_610wt_1192