since the device is using the I2C bus in an non standard way you are also allowed to implement it on your board with out so much as a standards care either. So I suggest you dispense with the normal pullup resistor on the SCL line (you imply the MPU has push pull output) and then put a resistor in series between MPU and the serial EEPROM. Then you go ahead and connect your parallel port programming clock to one of the DataOut bits where there is also active push-pull output. I think with 1.5K in series from MPU you would be in business.

Michael Karas