Greg,
When my engine blew up about 9 months (it holed a piston due to a loose injector clip)......The engine was removed from the car, sent to Harvey - completely rebuilt with new pistons etc and then fitted back into the car ALL within 10 days...Car was off the road for 10 days....
It seams an inlet mainfold is MUCH more complex to repair/O ring - so maybe I give Ahmed another 29 days

Ahmed did tell me that these things take as long as they take, and not to contact him about it