Been to SuperCheap Auto, Repco or Autobarn and found they only sell tiny mud flaps.

Keep the cops off your arse by fitting a decent set of mud flaps

Uneek 4x4 has extra long rubber mud flaps for those with big tyres and a big lift. Already have mounting holes punched out and lower edges contoured.  Cut them down if required. Heavy duty insertion rubber can take a beating

• 6mm Insertion rubber
• 450mm x 300mm
• M6 bolts, washers and nuts included
• Proudly made in Australia
• Keep your 4wd legal
• Sold in pairs