DS is about to get a new baby brother and will need a helicopter to distract him. It needs to have a winch for rescuing people.
The only one I've found so far is the Playmobil hospital one, which I know will be good (because all Playmobil is good) but is a bit pricey at c. £30 just for a new baby present. I found a Fireman Sam one but that one didn't have a winch and it is essential.
Toys R Us have some in (sorry can't do links to it for some reason). DS is also coveting it. There's also the Odd Bodz Emergency Superset odd bodz which DS has & loves. You can get it cheaper than on this site though