If you are looking for a complete set with everything you need, you may want to consider a travel system. It is not suitable for children heavier than 25 kg.
From Amazon
Hauck Shopper SLX Trioset Travel System, Stone Grey - Pushchair, Pram, Carry Cot & Car Seat, Compact & Foldable, with Raincover
Robert Dyas
Hauck Shopper Slx Trioset Pooh Cuddles