Since no lawyer filled your 485, you will get the original 485 approval notice. Your employer may have fileld 140/485 togather, but 485 is your application not your employers, and since he won't be representing you for the 485 application like attornies do, you will get the original approval notice.
your 140 approval notice would have gone to your employer, because 140 is filled by your employer not you.
You should usually get it in a week or so, but wait till 14 days, and if you still didn't get your approval notice call the 800 number and ask them to send you a new one.
Also I am not sure if you can just take a print out of the onlie case status and go and get your passport stamp. Maybe someone did that and can let you know.