For whatever reason, the cruise control cables tend to fail a lot, at least on the XR2's. The sheath breaks and wears, causing slop. There's no replacement for the cruise cables, but there are for the non-cruise (they're quite different on the firewall sides) the non-cruise cable fits to the firewall just fine on cruise cars
You shouldn't need any hardware or anything special, the new cable clips directly into the firewall, just remove the existing cables and junction box