You aren't likely to find anything like this commercially available, but you could build your own fairly easily. It would just require a "time-delay-relay", which are fairly expensive. Here's a link to some surplus ones:
Scroll down about 3-quarters of the page to find part #W211ACPSOX8 @ $39.
You would need to build an outlet box with a switch. The switch would activate your first couple of outlets and the relay. The relay would activate your "time-delay" outlets. Fairly straightforward, but you would need a bit of electronics/electrical know-how.