replace the regulators as i had suggested n you'll be ok! LM337, and L7805 five volt regulator, Digikey has them in stock@
L7905CP STMicroelectronics | Integrated Circuits (ICs) | DigiKey
LM337TG ON Semiconductor | Integrated Circuits (ICs) | DigiKey
the FET is IRFI9Z14GPBF Vishay Siliconix | Discrete Semiconductor Products | DigiKey
Alan