I just had a look and there isn't an alternative for the one DS got (City Fire Motorbike). I think he could just be creative though.

These kids are so cheeky, aren't they. We hid something for DD in the DS's cupboard just for a few hours as it was the only space big enough. He never ever opens that cupboard. But of course that morning he did DD was very excited about seeing her new bike. And not too impressed about having to wait until DH got home lol.