Ive found a seller on ebay that sells their own basically new circuit boards for models equipped with dome delay. They sell just the circuit board so you can just reuse the old plastic case.
If your dome delay doesnt work, or you didnt even know you had dome delay because it has never worked then chances are your circuit board is fried. Check for RPO code C94 on the build sheet if you have it.
But here is the link: http://www.ebay.com/itm/78-81-CHEVY-CHEVELLE-MALIBU-COURTESY-LIGHT-TIMER-BOARD-/130460060462?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e60068b2e&vxp=mtr
If your dome delay doesnt work, or you didnt even know you had dome delay because it has never worked then chances are your circuit board is fried. Check for RPO code C94 on the build sheet if you have it.
But here is the link: http://www.ebay.com/itm/78-81-CHEVY-CHEVELLE-MALIBU-COURTESY-LIGHT-TIMER-BOARD-/130460060462?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e60068b2e&vxp=mtr